Sending data back

A function can calculate a result and send it back to the caller using the return keyword. Once a function returns, it exits immediately. If you do not write return, the function returns None.

How it reads

• **return x * 2** calculates the value and immediately finishes the function
• result = double(10) captures the returned value (20) and stores it in result

Cloud tip: Do not confuse print() and return. print() displays text to the screen, while return passes data back to your code so you can use it in other calculations.