The return statement

The return statement is used to exit a function. Refer to the following syntax:

return [expression_list]

This statement may contain an expression where a value has to be returned. If there is no expression, then the function will return a None object, as shown in the following example:

def return_value(a):
    if a >= 0:
        return a
    else:
        return -a
print(return_value(2))
print(return_value(-4))

Output:
2
4