Swapping Two Strings in JavaScript Without Using Third Variable | JavaScript Interview Question
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In this video, we are going to learn a very popular interview question —
How to swap two string variables in JavaScript without using a third variable.
This technique helps us understand string concatenation, substring extraction, and logical thinking — highly useful in interviews and coding rounds.
Program Logic Overview
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Concatenate both strings
Extract the first string using substring
Extract the remaining part to get the second string
No temporary variable used!
Program Output
==============
s1 → mango
s2 → apple
This is one of the most frequently asked JavaScript interview programs, especially in automation testing and developer interviews.
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