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C#

Posted by Kevin Narain
Kevin Narain
11,379 Points

Why does this for loop gets executed 100 times?

I'm creating a for loop here.

for (int i = 100; i > 0; i--) {
   Console.WriteLine(i);
}

Why does this gets printed 100 times? 1 is the last comparison number in this for loop, thus 1 > 0 which is true. From here 0 > 0 is false right? So it should print 99 times am I right?

1 Answer

Jennifer Nordell
seal-mask
STAFF
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Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there, Kevin Narain! Yes, it gets printed 100 times. I think you're subtracting 1 from 100 and getting 99. Once it gets down to 0 it stops printing. But between 100 and 1 there are 99 numbers. But that doesn't include the 1.

For example, if counting on your fingers from 1 to 10 there is a difference of 9. But because both 1 and 10 are included in the count, there are ten fingers held up :smiley:

In this case, we're counting down from 100 to 1 and all of those get printed. That includes both the 100 and the 1.

Hope this helps! :sparkles:

Kevin Narain
Kevin Narain
11,379 Points

Hi Jennifer Nordell, thanks for your swift response I finally get it now!