What’s a Function?

Operators

An “operator” in a program looks like your Math book:

  5 + 10   # Addition
  10 - 5   # Subtraction
  21 * 2   # Multiplication
  21 / 7   # Division

What about Square Roots?

We don’t have a symbol for square root.

Our keyboards are pretty limited.

My first computer could only display 127 characters

Functions!

  • Has a name
  • Usually has an “input”
  • Returns an “output”
    sqrt(36)
    (sqrt 36)

Date: 2014 Nov 21

Created: 2020-12-23 Wed 10:14