# Chapter 14 - Summary¶

Chapter 14 included the following concepts from computing.

• Function - A function is a named set of instructions that returns a result. An example is the `abs(num)` which returns the absolute value of the num.

• Library - A library is a named group of related procedures and functions. An example is the Turtle library.

• Procedure - A procedure is a named set of instructions that does not return a result, but can cause something to happen like the turtle `forward(amount)` procedure.

• Random number generator - A random number generator will return a random number.

## Summary of Python Keywords and Functions¶

• Modulo - The modulo, or remainder operator, `%`, returns the remainder after you divide one value by another. For example the remainder of `3 % 2` is 1 since 2 goes into 3 one time with a remainder of 1.

• Randrange - The `randrange` function is used to return a random number. It is part of the `random` library.

Note

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