4.3 Arithmetic Operators

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Notes

Python can do math with these operators:

Operator	Meaning	Example	Result
`+` `-` `*`	add, subtract, multiply	`4 * 3`	`12`
`/`	division (always a float)	`7 / 2`	`3.5`
`//`	floor division	`7 // 2`	`3`
`%`	remainder (modulus)	`7 % 2`	`1`
`**`	exponent	`2 ** 3`	`8`

Order of operations: parentheses, then **, then * / // %, then + -.
10 / 2 gives 5.0, a float, not 5.
n % 2 == 0 is a common test for an even number.

What does print(17 % 5) display?

17 divided by 5 is 3 remainder 2, and % gives the remainder.

What does print(2 + 3 * 4) display?

What does print(10 // 4) display?