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A function is often denoted by a letter such as f, g or h. The value of a function f at an element x of its domain (that is, the element of the codomain that is associated with x) is denoted by f(x); for …

But a function doesn't really have belts or cogs or any moving parts, and it doesn't actually destroy what we put into it! A function relates an input to an output.

Jul 24, 2026 · function, in mathematics, an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).

Jul 8, 2026 · A function is a special type of relation that assigns each element of a set A to exactly one element of a set B. Here, set A is called the domain, and set B is called the codomain.

function, office, duty, province mean the acts or operations expected of a person or thing. function implies a definite end or purpose or a particular kind of work.

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This disambiguation page lists articles associated with the title Function. If an internal link incorrectly led you here, you may wish to change the link to point directly to the intended article.

Nov 28, 2016 · Learn More at mathantics.comVisit http://www.mathantics.com for more Free math videos and additional subscription based content!

Sep 21, 2025 · What a function is and how to use function notation How to find the domain and range The basics of inverse functions and how they work Transformations of functions and what they look …