Karl Jones: Created page with "In computer programming,'''Call by value''' (also referred to as '''pass by value''') an evaluation strategy in which the argument..."

2016-09-24T23:29:20Z

Created page with "In computer programming,'''Call by value''' (also referred to as '''pass by value''') an evaluation strategy in which the argument..."

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In [[computer programming]],'''Call by value''' (also referred to as '''pass by value''') an [[evaluation strategy]] in which the [[Parameter (computer programming)|argument]] expression is evaluated, and the resulting [[Value (computer science)|value]] is bound to the corresponding variable in the function (frequently by copying the value into a new memory region).

== Description ==

If the function or procedure is able to assign values to its parameters, only its local copy is assigned—that is, anything passed into a function call is unchanged in the caller's scope when the function returns.

Call by value is not a single evaluation strategy, but rather the family of evaluation strategies in which a function's argument is evaluated before being passed to the function. While many programming languages (such as Common Lisp, Eiffel and Java) that use call by value evaluate function arguments left-to-right, some evaluate functions and their arguments right-to-left, and others (such as Scheme, OCaml and C) leave the order unspecified.

== See also ==

* [[Beta normal form]]
* [[Call by reference]]
* [[Comparison of programming languages]]
* [[Eval()]]
* [[Evaluation strategy]]
* [[Lambda calculus]]
* [[Parameter (computer programming)]]
* [[Variable (computer science)]]

== External links ==

* [https://en.wikipedia.org/wiki/Evaluation_strategy Evaluation strategy] @ Wikipedia

[[Category:Computer programming]]

Call by value - Revision history

Karl Jones: Created page with "In computer programming,'''Call by value''' (also referred to as '''pass by value''') an evaluation strategy in which the argument..."