the hello world program using the python language. A classic intro to programming.

hello_world.py

# Python 2.7

# let's have the computer tell us "hello world!"
# Remember, a computer program is a set of instructions we tell the computer what to do.

print("Hello World!")

# When we run the program, Python returns the string inside the parentheses
# a string is just any series of letters, numbers, or symbols. Think of it as a line of text.

# The print(), is a function. If you've played Lightbot, function is another word for a procedure
# a function is just a block of code to perform a specific task and we can reuse

# Variables:

message = "Hello World!"
print(message)
# Line 15 and 16 outputs the same information as line 5, we just put the string into a variable
# A variable is just a placeholder for information
# In this case, Python will recognize message as that string

# Loops:
# We've already learned that one way we can repeat code is by using a loop
# What if we wanted to print "Hello World!" 10 times
# Sure, we could type print("Hello World!") 10 times, on ten different lines, then run the program
# But, this technique could take a long time!

# Instead, we can use the loop function, one such loop we could use is the for loop
# Let's see this in action:

for i in range(10):
  print("Hello World!")
# When we run line 30 and 31, Python will return the string, 'Hello World!' 10 times! Mission Accomplished!

import math
from turtle import*
def hearta(k):
return 15math.sin(k)**3
def heartb(k):
return 12math.cos(k)-5*
math.cos(2k)-2
math.cos(3k)-
math.cos(4K)
speed(1000)
bgcolor("black")
for i in range(6000):
goto(hearta(i)*20,heartb(i)*20)
for j in range(5):
color("#f73487")
goto(0,0)
done()