What is a function?

a function is just a "block" of code that you can name, and then call again later

they can be particularly useful for when we have a block of code that we want to execute routinely with small differences.

What is a function?

for example what if we had the following group of code

							
							name = input("who are you? ")
							print("hello ", name * 200)
							
						

but what if we wanted to change this 200 to be something else in the future?

What is a function?

we could group this into a function and call it over and over again!

							
							def greet_a_lot(name, num)
								print("hello ", name * num)

							name = input("who are you? ")
							for i in range(99999):
								greet_a_lot(name, 999999999999999)
								print(i)
							
						

What is scope?

scope just restricts access to certain variables

What is scope?

here is a code block that might help reinforce some of the concepts

							
							GLOBAL_VAR = 10
							def func1():
								print(GLOBAL_VAR)
								var1 = 5
								print(var1)
							def func2(arg1):
								print(arg1)
								print(GLOBAL_VAR)
							if __name__ == "__main__":
								func1()
								func2()
								print(arg1) # Throws an error, we don't have access
							
						

What is scope?

scope can be a little confusing at first so don't be afraid to ask questions