assignment (programming) Storing the value of an expression in a variable. This is commonly written in the form "v = e". In Algol the assignment operator was ":=" (pronounced "becomes") to avoid mathematicians qualms about writing statements like x = x+1.
Assignment is not allowed in functional languages, where an identifier always has the same value. See also referential transparency, single assignment, zero assignment. Last updated: 1996-08-19