Python funcs returns and float/Decimal

main.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "ecc849da",
   "metadata": {},
   "outputs": [],
   "source": [
    "def square(num):\n",
    "    result = num * num\n",
    "    print(result)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "a85ae3db",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "9\n"
     ]
    }
   ],
   "source": [
    "square(3)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "55f5e660",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "16\n"
     ]
    }
   ],
   "source": [
    "square(4)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "491a58e7",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "4\n"
     ]
    }
   ],
   "source": [
    "square(2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "d9b3441c",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "16\n"
     ]
    }
   ],
   "source": [
    "square(4)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "id": "09d6f078",
   "metadata": {},
   "outputs": [],
   "source": [
    "def square(num):\n",
    "    result = num * num\n",
    "    print(result)\n",
    "    return result"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "2b5ecf38",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "4\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "4"
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "square(2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "id": "25df9656",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "9\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "9"
      ]
     },
     "execution_count": 8,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "square(3)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "f7627677",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "4\n",
      "16\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "16"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "square(square(2))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "1874a9e6",
   "metadata": {},
   "outputs": [],
   "source": [
    "def square(num):\n",
    "    result = num * num\n",
    "    return result"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "id": "a1fd3b15",
   "metadata": {},
   "outputs": [],
   "source": [
    "def square(num):\n",
    "    return num * num"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "id": "16a28947",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "25"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "square(5)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "9df61b56",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "625"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "square(square(5))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "id": "c8026c6d",
   "metadata": {},
   "outputs": [],
   "source": [
    "five_squared = square(5)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "id": "48164e6c",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "25\n"
     ]
    }
   ],
   "source": [
    "print(five_squared)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "id": "71bb2683",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "625"
      ]
     },
     "execution_count": 16,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "square(five_squared)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "id": "c3c82c35",
   "metadata": {},
   "outputs": [],
   "source": [
    "def check_age(age):\n",
    "    if age < 18:\n",
    "        return \"Young\"\n",
    "    else:\n",
    "        return \"Old enough\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "id": "8ecac501",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Young'"
      ]
     },
     "execution_count": 18,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "check_age(17)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "68007f5d",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Old enough'"
      ]
     },
     "execution_count": 19,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "check_age(18)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "id": "93e5040e",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Old enough'"
      ]
     },
     "execution_count": 20,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "check_age(21)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "id": "c0cb8fdb",
   "metadata": {},
   "outputs": [],
   "source": [
    "def check_age(age):\n",
    "    if age < 18:\n",
    "        return \"Young\"\n",
    "    return \"Old enough\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "id": "874f9a2c",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Young'"
      ]
     },
     "execution_count": 22,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "check_age(10)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "id": "a6afe58a",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Old enough'"
      ]
     },
     "execution_count": 23,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "check_age(18)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "id": "dc692257",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Old enough'"
      ]
     },
     "execution_count": 24,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "check_age(25)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "id": "7ac274f1",
   "metadata": {},
   "outputs": [],
   "source": [
    "def check_age(age):\n",
    "    if age < 18:\n",
    "        return \"Young\"\n",
    "    if age < 21:\n",
    "        return \"Old enough\"\n",
    "    return \"Adult\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "id": "d997911b",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Young'"
      ]
     },
     "execution_count": 26,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "check_age(10)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "id": "89da34a3",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Old enough'"
      ]
     },
     "execution_count": 27,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "check_age(18)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "id": "938c5e0e",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Old enough'"
      ]
     },
     "execution_count": 28,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "check_age(20)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "id": "c79016ba",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Adult'"
      ]
     },
     "execution_count": 29,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "check_age(21)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "id": "bd304cf1",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Adult'"
      ]
     },
     "execution_count": 30,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "check_age(25)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "id": "2c280431",
   "metadata": {},
   "outputs": [],
   "source": [
    "def divide(a, b):\n",
    "    if b == 0:\n",
    "        return None\n",
    "    return a / b"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 32,
   "id": "431f1e2d",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2.5\n"
     ]
    }
   ],
   "source": [
    "print(divide(10, 4))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 33,
   "id": "3f315ac7",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "None\n"
     ]
    }
   ],
   "source": [
    "print(divide(10, 0))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 34,
   "id": "586b4d75",
   "metadata": {},
   "outputs": [],
   "source": [
    "def divide(a, b):\n",
    "    if b == 0:\n",
    "        return\n",
    "    return a / b"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 35,
   "id": "4078016b",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "3.75\n"
     ]
    }
   ],
   "source": [
    "print(divide(30, 8))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 36,
   "id": "f7104f75",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "None\n"
     ]
    }
   ],
   "source": [
    "print(divide(30, 0))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 37,
   "id": "87f727f6",
   "metadata": {},
   "outputs": [],
   "source": [
    "def divide(a, b):\n",
    "    if b != 0:\n",
    "        return a / b"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 38,
   "id": "3df83dde",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "3.5\n"
     ]
    }
   ],
   "source": [
    "print(divide(7, 2))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 39,
   "id": "b8555bae",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "None\n"
     ]
    }
   ],
   "source": [
    "print(divide(7, 0))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "id": "d87d68fd",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "3.1415\n"
     ]
    }
   ],
   "source": [
    "pi = 3.1415\n",
    "print(pi)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 41,
   "id": "45526a89",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "<class 'float'>\n"
     ]
    }
   ],
   "source": [
    "print(type(pi))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 42,
   "id": "7552ebd6",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "True\n"
     ]
    }
   ],
   "source": [
    "print(isinstance(pi, float))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 43,
   "id": "45ad5d50",
   "metadata": {},
   "outputs": [],
   "source": [
    "def divide_n_times(value, divider, times):\n",
    "    for i in range(times):\n",
    "        value /= divider\n",
    "    return value"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 48,
   "id": "773a364a",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1.75"
      ]
     },
     "execution_count": 48,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "divide_n_times(28, 4, 2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 49,
   "id": "df092fa9",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0.12345000000000002"
      ]
     },
     "execution_count": 49,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "divide_n_times(12345, 10, 5)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 50,
   "id": "e8e40cee",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "3.3000000000000003"
      ]
     },
     "execution_count": 50,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "1.1 + 2.2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 51,
   "id": "f8fb0eb1",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "not equal\n"
     ]
    }
   ],
   "source": [
    "if 1.1 + 2.2 == 3.3:\n",
    "    print(\"are equal\")\n",
    "else:\n",
    "    print(\"not equal\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 52,
   "id": "b0284562",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0.00123"
      ]
     },
     "execution_count": 52,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "123 / 100000"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 53,
   "id": "b62758e2",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "0.000123"
      ]
     },
     "execution_count": 53,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "123 / 1000000"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 54,
   "id": "d4061197",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1.23e-07"
      ]
     },
     "execution_count": 54,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "123 / 1000000000"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 55,
   "id": "b2753501",
   "metadata": {},
   "outputs": [],
   "source": [
    "ant_weight = 2e-6"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 56,
   "id": "22e10daa",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "The weight of the ant is 2e-06 kilograms.\n"
     ]
    }
   ],
   "source": [
    "print(\"The weight of the ant is\", ant_weight, \"kilograms.\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 58,
   "id": "01b6376e",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "The weight of the ant is 0.000002 kilograms.\n"
     ]
    }
   ],
   "source": [
    "print(f\"The weight of the ant is {ant_weight:.6f} kilograms.\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 59,
   "id": "e6aab2bc",
   "metadata": {},
   "outputs": [],
   "source": [
    "earth_weight = 5.97e24"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 60,
   "id": "ed0b2ade",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "The weight of the Earth is 5.97e+24 kilograms.\n"
     ]
    }
   ],
   "source": [
    "print(\"The weight of the Earth is\", earth_weight, \"kilograms.\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 61,
   "id": "210e616d",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 61,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "earth_weight == 5.97e+24"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 62,
   "id": "36a139d5",
   "metadata": {},
   "outputs": [],
   "source": [
    "from decimal import Decimal"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 63,
   "id": "37bc8c62",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Decimal('3.3')"
      ]
     },
     "execution_count": 63,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "Decimal('1.1') + Decimal('2.2')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 64,
   "id": "673f4e97",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "not equal\n"
     ]
    }
   ],
   "source": [
    "if (Decimal(\"1.1\") + Decimal(\"2.2\")) == 3.3:\n",
    "    print(\"are equal\")\n",
    "else: \n",
    "    print(\"not equal\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 65,
   "id": "ad02e99b",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "False"
      ]
     },
     "execution_count": 65,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "Decimal('3.3') == 3.3"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 66,
   "id": "fe88fde6",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 66,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "Decimal('3.3') == Decimal('3.3')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 67,
   "id": "a5af8e77",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 67,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "float(Decimal('3.3')) == 3.3"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 68,
   "id": "e41c5428",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 68,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "Decimal('1') == 1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 69,
   "id": "fa0641e0",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "False"
      ]
     },
     "execution_count": 69,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "Decimal('1.1') == 1.1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 70,
   "id": "56021200",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 70,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "(Decimal(\"1.1\") + Decimal(\"2.2\")) == Decimal(\"3.3\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 71,
   "id": "c44d1bc9",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "True"
      ]
     },
     "execution_count": 71,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "float(Decimal(\"1.1\") + Decimal(\"2.2\")) == 3.3"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 72,
   "id": "a3cecf20",
   "metadata": {},
   "outputs": [],
   "source": [
    "def divide_n_times(value, divider, times):\n",
    "    value = Decimal(value)\n",
    "    for i in range(times):\n",
    "        value /= divider\n",
    "    return value"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 73,
   "id": "811b4f05",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Decimal('1.75')"
      ]
     },
     "execution_count": 73,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "divide_n_times(28, 4, 2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 74,
   "id": "d0aba1a4",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "Decimal('0.12345')"
      ]
     },
     "execution_count": 74,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "divide_n_times(12345, 10, 5)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "7ae5d296",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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   "codemirror_mode": {
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