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  1. 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 …

  2. 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.

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

    Jan 13, 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). Functions are …

  4. Functions in C++ - GeeksforGeeks

    Jan 24, 2026 · Function Usage Function Syntax To work with functions in C++, it is important to understand how they are written, declared, and called. This section covers function syntax, …

  5. What Are Functions in Math?- Cuemath

    Functions define the relationship between two variables, one is dependent and the other is independent. Function in math is a relation f from a set A (the domain of the function) to another set B (the co …

  6. Functions | Algebra 1 | Math | Khan Academy

    About this unit A function is like a machine that takes an input and gives an output. Let's explore how we can graph, analyze, and create different types of functions. Unit guides are here! Power up your …

  7. 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 …

  8. Functions | Algebra (all content) | Math | Khan Academy

    What is a function? What is the domain of a function? What is the range of a function? Does a vertical line represent a function?

  9. function - Declare function name, inputs, and outputs - MATLAB

    Function with One Output Define a function in a file named calculateAverage.m that accepts an input vector, calculates the average of the values, and returns a single result.

  10. Azure Functions documentation | Microsoft Learn

    Azure Functions is a managed platform-as-a-service (PaaS) provider that provides event-driven and scheduled compute resources for Azure cloud services. You can focus on the code that matters most …