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  1. FUNCTION Definition & Meaning - Merriam-Webster

    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.

  2. Function (mathematics) - Wikipedia

    The concept of a function was formalized at the end of the 19th century in terms of set theory, and this greatly increased the possible applications of the concept. A function is often denoted by a letter …

  3. What is a Function - Math is Fun

    What is a Function? A function relates an input to an output. It is like a machine that has an input and an output. And the output is related somehow to the input. " f (x) = ... " is the classic way of writing a …

  4. Python Functions - W3Schools

    Python Functions A function is a block of code which only runs when it is called. A function can return data as a result. A function helps avoiding code repetition.

  5. FUNCTION | English meaning - Cambridge Dictionary

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

  6. Function - definition of function by The Free Dictionary

    These nouns denote the actions and activities assigned to, required of, or expected of a person: the function of a teacher; a bank clerk's duty; performed the office of financial adviser; the role of a parent.

  7. Algebra - The Definition of a Function - Pauls Online Math Notes

    Jun 14, 2024 · We also give a “working definition” of a function to help understand just what a function is. We introduce function notation and work several examples illustrating how it works. We also …

  8. 3.1 What Are Functions? - MIT Mathematics

    The simplest definition is: a function is a bunch of ordered pairs of things (in our case the things will be numbers, but they can be otherwise), with the property that the first members of the pairs are all …

  9. Function - Math.net

    A function is a relation between two sets in which each member of the first set is paired with one, and only one, member of the second set. A function rule is a rule that explains the relationship between …

  10. Function | Definition, Types, Examples, & Facts | Britannica

    Dec 1, 2025 · Function, in mathematics, an expression, rule, or law that defines a relationship between one variable (the independent variable) and another variable (the dependent variable).