if/else & switch Statements — Free JavaScript Tutorial
Learn if/else & switch Statements in JavaScript with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.
TL;DR: Learn if/else & switch Statements 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
if/else & switch Statements in JavaScript
`if(condition)` — runs block if condition is truthy. `else if` — chain multiple conditions. `else` — runs if none match.
Truthy vs Falsy: falsy values: `false, 0, "", null, undefined, NaN`. Everything else is truthy.
`switch(value)` — matches value against `case` labels. Always add `break` after each case or they "fall through".
Optional chaining: `user?.address?.city` — safely access nested properties without errors if any is null/undefined.
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