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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.

A function of that nature can be called at any time, anywhere. jQuery (a library built on Javascript) has built in functions that generally required the DOM to be fully rendered before being called.

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.

4 days ago · 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.

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).

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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.

FUNCTION definition: 1. the natural purpose (of something) or the duty (of a person): 2. an official ceremony or a…. Learn more.