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JavaScript JavaScript Loops Working with 'for' Loops Review for Loops and Exiting Loops

Jason Nutt
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Jason Nutt
Front End Web Development Techdegree Graduate 24,760 Points
Posted by Jason Nutt
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Jason Nutt
Front End Web Development Techdegree Graduate 24,760 Points

I was thinking that 0 would be included into the factoring of this for loop? Making the answer 9.

for ( let i = 0; i < 9; i ++ ) { console.log(i); }

3 Answers

Heidi Fryzell
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Heidi Fryzell
Front End Web Development Treehouse Moderator 25,178 Points
Heidi Fryzell
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Heidi Fryzell
Front End Web Development Treehouse Moderator 25,178 Points

Hi Jason,

This was a tricky one.

The answer would be 9 if the condition were: i <=9

But since you could not change the comparison operator to include the equals sign you had to use i < 10 in order for the loop to run 10 full times.

Remember that the loop starts counting at zero.

0 - 1st time 1 - 2nd time 2 - 3rd time 3 - 4th time 4 - 5th time 5 - 6th time 6 - 7th time 7 - 8th time 8 - 9th time 9 - 10th time.

If the condition is set to i < 9, it will evaluate to false when i = 9 and it won't run a tenth time.

I hope that makes sense. Happy Coding!

Heidi