Answer
Inside loop, let creates a new binding for each iteration, preventing closure-related bugs.
Quick Answer
let inside a loop creates a new binding for each iteration — closures inside the loop capture their own independent copy of the variable. var inside a loop shares one variable across all iterations — closures capture the same reference. Classic bug: setTimeout inside a for-var loop all see the final value. for-let doesn't have this problem.
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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