Function returning None in Python

Question

Below code is printing None, but should be printing a value

num_ex = 3.5

def my_func(x):
    if x >= 3.00:
        x - 1
    else:
        x + 1

var_ex = my_func(num_ex)
print(var_ex)

How could it possibly return a value, when it has no `return` statement in it? — jasonharper, Oct 20 '22 at 01:10
@JackW24 he means that your function definition needs to have `return x` at the end, in order for `my_func(num_ex)` to return to some value to assign `var_ex`. Current it has no return statement, so `my_funct()` evaluates to `None` which makes the expression evaluate to `var_ex = None` — Michael Moreno, Oct 20 '22 at 01:15

Maxwell D. Dorliea · Answer 1 · 2022-10-20T01:15:59.633

2

Every Python user define function return None by default. You are not returning anything that's why it's returning None

To return a value from a function you use the return keyword.

Note: the return keyword terminates the function immediately when encounter.

For Example

num_ex = 3.5

def my_func(x):
    if x >= 3.00:
       return x - 1
    return x + 1

var_ex = my_func(num_ex)
print(var_ex)

edited Oct 20 '22 at 01:15

answered Oct 20 '22 at 01:10

1 Answers1