Answer
Single quotes output text literally; double quotes parse variables and escape sequences.
Quick Answer
Single quotes treat content as literal text - no variable interpolation, minimal escape sequences. Double quotes parse variables and escape sequences like newlines. Single quotes are slightly faster. Use double quotes when you need variables embedded in the string. Use single quotes for static strings. Both are valid, consistency matters most.
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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