Python method not returning value

Question

I am having issues with values being returned exactly as they are passed to a method despite being modified inside the method.

def test(value):
    value+=1
    return value

value = 0
while True:
    test(value)
    print(value)

This stripped-down example simply returns zero every time instead of increasing integers as one might expect. Why is this, and how can I fix it?

I am not asking how the return statement works/what is does, just why my value isn't updating.

I updated it to differentiate the question. – Johnny Dollard May 27 '17 at 21:19 — Johnny Dollard, May 27 '17 at 21:19

score 3 · Accepted Answer · answered May 27 '17 at 21:15

3

You need to assign the return'd value back

value = test(value)

answered May 27 '17 at 21:15

Cory Kramer

score -1 · Answer 2 · answered May 27 '17 at 21:22

-1

Use this :-

def test(value):
  value+=1
  return value

value = 0
while True:
  print(test(value))

You weren't using the returned value and using the test(value) inside the print statement saves you from creating another variable.

answered May 27 '17 at 21:22

kartik.behl

That still will not increase his integer. – fuglede May 27 '17 at 21:24
it won't retain the updated result for reuse in other locations but for testing purpose he/she could use the print statement/simply just assign it to the variable "value" for usability purpose. Moreover, he/she didn't end the while loop so it's infinite execution. – kartik.behl May 27 '17 at 21:34

2 Answers2