Not sure how this extractDigits method works?

Question

The person must create a while loop to create an algorithm extractDigits that prints the individual digits of an integer. Ex) extractDigits(123) outputs "3", "2", "1".

I am not sure why exactly this method is correct and able to return each digit.

while(num > 0)
       {
            System.out.println(num % 10);
            num = (num/10);
        }

What you think it should be? Debug the code and then you will understand it. — Gaurav Jeswani, Nov 06 '19 at 04:56
Does this answer your question? [How to get the separate digits of an int number?](https://stackoverflow.com/questions/3389264/how-to-get-the-separate-digits-of-an-int-number) — Ruelos Joel, Nov 06 '19 at 04:57
Take pen and paper and dry run through the loop, you will know. — Ashvin Sharma, Nov 06 '19 at 04:59

score 0 · Answer 1 · answered Nov 06 '19 at 05:02

0

The modulus operator % returns the remainder of the two numbers after division

In excel MOD(123,10) = 3 similarly in java 123 % 10 = 3

then

when you divide (123/10) = 12 and loop continues until num=0

answered Nov 06 '19 at 05:02

vels4j

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Thanks for the quick and helpful replies! My mistake was I forgot that when it divides by ten, it gets rid of the remainder and assigns a new value without it. Than it just repeats. – ICEFIRE_16 Nov 06 '19 at 05:06

Not sure how this extractDigits method works?

1 Answers1