Js Loops Comprehensive — Free Javascript Tutorial

Learn Js Loops Comprehensive in Javascript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

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TL;DR: Learn Js Loops Comprehensive in Javascript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated Jul 14, 2026

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Js Loops Comprehensive in Javascript

`for` loop: `for(let i=0; i<n; i++)` — best when you know how many times to iterate.

`while` loop: `while(condition)` — best when condition-based, number of iterations unknown.

`do...while`: Runs at least once, then checks condition.

`for...of`: Iterates over iterable values (arrays, strings). `for (const item of array)`.

`for...in`: Iterates over object KEYS. `break` exits loop early. `continue` skips to next iteration.

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