Getting strange and unexpected output from python while loop

Question

I made a simple while loop to increase a number. And then I made a completely separate if condition to print a statement under certain circumstances. I don't understand why the two are being joined together.....

Write a program whose input is two integers. Output the first integer and subsequent increments of 5 as long as the value is less than or equal to the second integer.

Ex: If the input is:

-15
10

the output is:

-15 -10 -5 0 5 10

Ex: If the second integer is less than the first as in:

20
5

the output is:

Second integer can't be less than the first.

For coding simplicity, output a space after every integer, including the last.

My code:

''' Type your code here. '''
firstNum = int(input())
secondNum = int(input())

while firstNum <= secondNum:
    print(firstNum, end=" ")
    firstNum +=5
    


if firstNum > secondNum:
    print("Second integer can't be less than the first.")

Enter program input (optional)

-15
10

Program output displayed here

-15 -10 -5 0 5 10 Second integer can't be less than the first.

Think about what firstNum would be by the time you get to that if statement. — Loocid
– Loocid, Commented May 2, 2022 at 2:58
Thanks. I was under the impression my while loop made it so that the number is only incremented while its less than or equal to the second num. I see that's not the case now.... — skysthelimit91
– skysthelimit91, Commented May 2, 2022 at 3:04

Josh Clark · Accepted Answer · 2022-05-02 03:00:10Z

3

Your while loop is ensuring firstNum > secondNum by the time it finishes running. Then, you check to see if firstNum > secondNum (which it is), and your print statement gets executed.

answered May 2, 2022 at 3:00

Josh Clark

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Comments

Matthias Urlichs · Accepted Answer · 2022-12-09 17:54:46Z

0

a = int(input())
b = int(input())
if b < a:
    print("Second integer can't be less than the first.")
else:
    while a <= b:
        print(a, end=" ")
        a = a + 5
    print("")

edited Dec 9, 2022 at 17:54

Matthias Urlichs

2,62225 silver badges33 bronze badges

answered Dec 4, 2022 at 1:29

Farmita Fariha

11 bronze badge

4 Comments

chrslg Over a year ago

Please avoid code only answer, which are not as helpful as they could be, with an explanation. Especially on old questions with existing upvoted answers

Farmita Fariha Over a year ago

@chrslg I am very new here. I'll keep in mind.

Kishan K Over a year ago

@FarmitaFariha, please edit your answer to specify what you mean to say with some description. You can still edit your answer any number of times after you post

Matthias Urlichs Over a year ago

@FarmitaFariha please don't just "keep it in mind"; edit the answer to add some explanation. NB, I fixed your code. Your version missed an indent.

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