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High Quality Content by WIKIPEDIA articles! expr is a command line Unix utility which evaluates an expression and outputs the corresponding value. It first appeared in Unix v7 as a standalone program, and was later incorporated into the shell as aMoreHigh Quality Content by WIKIPEDIA articles! expr is a command line Unix utility which evaluates an expression and outputs the corresponding value. It first appeared in Unix v7 as a standalone program, and was later incorporated into the shell as a built-in command. Expr by Jesse Russell
