computer programming, an assignment statement

Jul 7th, 2015
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n computer programming, an assignment statement sets or re-sets the value stored in the storage location(s) denoted by a variable name. In most imperative computerprogramming languages, assignment statements are one of the basic statements. Common notations for the assignment operator are = and :=.[1] Assignment statements typically allow for the same variable to contain different values at different times during program execution. Thus, languages featuring destructive assignment rarely enforce referential transparency, which requires a procedure to return the same results for a given set of inputs at any point in time.

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COMPUTERSncomputer programming, anassignment statementsets or re-sets thevaluestored in the storage location(s) denoted by avariablename. In mostimperativecomputerprogramming languages, assignment statements are one of the basicstatements. Common notations for the assignmentoperatorare=and:=.[1]Assignment statements typically allow for the same variable to contain different values at different times duringprogramexecution. Thus, languages featuring destructive assignment rarely enforcereferential transparency, which requires a procedure to return the same results for a given set of inputs at any point in time.Contents[hide]1Semantics1.1Single assignment2Value of an assignment3Chained assignment4Parallel assignment5Assignment versus equality6Notation7See also8References[edit]SemanticsAn assignment operation is a process inimperative programmingin which different values are associated with a particular variable name as time passes.[2]The program, in such model, operates by changing its state using successive assignment statements.[1][3]Primitives of imperative programming languages rely on assignment to doiteration.[4]At the lowest level, assignment is implemented usingmachine operationssuch asMOVEorSTORE.[1][4]Thevariablesare containers for values. It is possible to put a value into variable and later replace it with a new one. An assignment operation modifies the curren

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