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A function is a block of code which only runs when it is called. You can pass data, known as parameters, into a function. Functions are used to perform certain actions, and they are important for reusing code: Define the code once, and use it many times.
A function is a set of statements that takes input, does some specific computation, and produces output. The idea is to put some commonly or repeatedly done tasks together to make a function so that instead of writing the same code again and again for different inputs, we can call this function.
C++ allows the programmer to define their own function. A user-defined function groups code to perform a specific task and that group of code is given a name (identifier). When the function is invoked from any part of the program, it all executes the codes defined in the body of the function.
In C++, a function is a group of statements that is given a name, and which can be called from some point of the program. The most common syntax to define a function is: type name ( parameter1, parameter2, ...) { statements } Where: - type is the type of the value returned by the function.
A function declaration introduces the function name and its type. A function definition associates the function name/type with the function body. Function declarations may appear in any scope.
A function is a block of code that performs some operation. A function can optionally define input parameters that enable callers to pass arguments into the function. A function can optionally return a value as output.
C++ programs can work the same way (and borrow some of the same nomenclature). A program will be executing statements sequentially inside one function when it encounters a function call. A function call tells the CPU to interrupt the current function and execute another function.