Regular Expressions: Pattern Matching and Text Manipulation Text processing requires structural analysis. Evaluating string components using standard conditional loops scales poorly. Regular Expressions (RegExp) define complex search patterns. They execute rapid validation, extraction, and replacement operations. The Need for Regular Expressions Form validation demands rigorous input checking. An email address must contain specific character sequences. Passwords require structural complexity. Attempting to validate these rules manually via if statements and substring extraction generates bloated, unmaintainable code. ...