PDF Version INTRODUCTION In a programming language, a string is a sequence of characters that often represents some message to the user or contains input such as a name or the contents of a file. Common operations on strings include comparison and collation, extraction of substrings (tokenization), pattern matching, and data clean up such as trimming whitespace. In the 1960s, language designers started to add first-class string datatypes to their languages as business computing and interactiv...
