Functions

A function, What is it?

It is away to create re-usable code; something you might use more than once or away of creating blocks of code that are more easily read.

As an example:

A Math function

A print statement

From lesson 1 we saw c = a**2 + b**2 its called Pythagorean Theorem but the original form was very limiting. How can we make it more usable?

A function can define something with

• no input and no return
• input and no return
• input and a return

def print_lunchtime():
     print(" Really its lunch time?\n")

def math_pythag_therem(data):
     print("a good book to read might be " + data)

def math_pythag_therem(a,b):
     #
     # find the hypotenuse of a right triangle
     #
    result = a**2 + b**2
    c = result**(1/2.0)
    return c

If you want to read up on the Theorem go to the Wiki

What ideas can you think of for a print statement? Maybe a template for a repeating form block? Try to come up with a print function.

Excel

Now a deep dive.

example: excel with small functions?

Moving forward to Lesson 7

Moving back to Lesson 5