for free

[common] Said of a capability of a programming language or hardware that is available by its design without needing cleverness to implement: "In APL, we get the matrix operations for free." "And owing to the way revisions are stored in this system, you get revision trees for free." The term usually refers to a serendipitous feature of doing things a certain way (compare {big win}), but it may refer to an intentional but secondary feature.

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