Today, we went over infix, prefix, postfix notation, and how to convert them.

## Homework

## Class Notes

Regular math equations include operations and operands

operands are numbers and variables

operations are the actions performed on operands

+, -, *, /

Infix notation is what we normally use to do math

the operation is written between the operands

order of operations (PEMDAS): parenthesis, exponents, multiplication, division, addition, subtraction

Prefix notation and postfix notation are better for computers

In prefix notation, the operation is written before the operands

ex: 2+2 would be +2 2

In postfix notation, the operation is written after the operands

ex: 2+2 would be 2 2+

Why use prefix and postfix notation?

With prefix and postfix, order of operation does not matter and you’ll get the same result no matter what

This is much easier for computers to work with

To convert from infix to prefix/postfix:

Follow the order of operations and fully parenthesize the expression

Convert the sections into prefix/postfix based on the order you would evaluate them