jimjilbang2.py

# The print function

print('Hello') # Hello

print(3) # 3

# Variables

greeting = 'Hello'

print(greeting) # Hello

other_greeting = "Hi"

print(other_greeting) # Hi

number = 5

print(number) # 5 

number = number + 1

print(number) # 6

# Comments

# This is a comment line. A # on its own begins a comment, with anything to the right of it being ignored when the script runs.
# I've used comments to indicate the output for each print line. You wouldn't normally do this.

# String concatenation

greeting = 'Hello ' + 'world'

print(greeting) # Hello world

greeting_again = greeting + ' again!'

print(greeting_again) # Hello world again!

# If the result is a string, we can put that straight into the print function

print('Hello ' + 'World!') # Hello World!

# Other things can be printed too. Everything has a printable representation.

print(5 + 3) # 8

# Functions

def add_one(num):
  return num + 1

next_num = add_one(3)

print(next_num) # 4

# Challenge one: What does this function do? How do you use it?

def welcome(name):
	return 'Hello ' + name

# Solution:

# This function takes in a string and returns a new string that is the original string with the prefix of 'Hello '
# e.g.: welcome('Graham') returns 'Hello Graham'

person = 'Graham'

greeting = welcome(person) 

print(greeting) # Hello Graham

# or:

print(welcome('Graham')) # Hello Graham