Functions

301.12 Subprograms

Subprograms — Note 3 of 4

Return a value to program.

What you need to know

A function is a subprogram that calculates and returns a value using the return keyword. The returned value can be stored in a variable or used in an expression.

What to know

Uses return to send a value back
result = my_function() stores the returned value
Can return any type: int, str, bool, list
Function ends immediately when return is reached

Code examples

Function with return

python

def calculate_area(width, height):
    return width * height

area = calculate_area(5, 3)
print("Area: " + str(area))  # Area: 15

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Specification notes for programming are in Paper 2.