Short form of expression, commonly used in programming and mathematics to denote a formula or statement.
Abbreviation of 'expression' from Latin 'expressio', from 'exprimere' meaning 'to press out, represent'. In computing contexts, first used in early programming languages of the 1950s as a shortened form for efficiency.
In programming, 'expr' represents one of the most fundamental concepts—a piece of code that produces a value. Every time you write '2 + 3' or call a function, you're creating an expression, making 'expr' perhaps the most used abbreviated term in all of computer science.
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