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What does EXPR stand for? 

What does EXPR mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: EXPR.

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expr

EXPRession

Computing » Unix

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EXPR

Express, Inc.

Business » NYSE Symbols -- and more...

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EXPR

Expression Support

Computing » IT

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What does EXPR mean?

expr
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. Syntax: expr expr evaluates integer or string expressions, including pattern matching regular expressions. Most of the challenge posed in writing expressions is preventing the invoking command line shell from acting on characters intended for expr to process. The operators available for integers: addition, subtraction, multiplication, division and modulus for strings: find regular expression, find a set of characters in a string; in some versions: find substring, length of string for either: comparison The following is an example involving boolean expressions: This example outputs "1". This is because length "abcdef" is 6, which is not less than 5. But 15 minus 4 is 11 and is greater than 8, so the right side is true, which makes the or true, so 1 is the result. The program exit status is zero for this example. For pure arithmetic, it is often more convenient to use bc. For example:

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