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#REDIRECT [[Function (computer programming)]]
In [[programming]], an [[algorithm]] is roughly synonymous with a [[method]]. An algorithm/method may return some kind of value to the calling code, but is essentially a block of code used to perform a series of actions or modifications.
In contrast, a [[Subroutine|function]] is required to return a value. There may be some [[programming language]]s for which this is not a syntactic requirement; but that's the philosophical distinction.