Arithmetic Operators

Arithmetic operators do number work.

They are the same ideas as school math.

Add toys. Share cookies. Count leftovers.

Python writes them with short signs.

Add and subtract

+ adds. - subtracts.

You can use numbers or variables.

Multiply and divide

* multiplies. / divides.

Division with / always gives a float.

Floor divide and remainder

// divides and keeps the whole part.

% gives the leftover.

Like sharing 10 cookies with 3 kids. Each gets 3. One cookie is left.

Powers

** means raised to a power.

2 ** 3 means 2 times 2 times 2.

Shortcuts that update a variable

These change a variable and put the answer back in the same drawer.

Parentheses for clarity

Use parentheses when the order could confuse a reader.

Clear order beats clever order.

Tip: Remember / gives a float. Use // when you want whole shares only.