Answer
setTimeout: runs code once after delay.
setInterval: runs repeatedly at intervals.
Quick Answer
setTimeout(fn, ms): calls fn once after ms milliseconds. setInterval(fn, ms): calls fn repeatedly every ms milliseconds. Both are async — they don't block. The actual delay may be longer than specified (minimum is 0ms, actual depends on event loop state). Always clearInterval(id) to stop a repeating interval, or it runs forever.
S
SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ