What is function Explain the user define function with example?

Answer 1

Function is a logically grouped piece of code allowing perform certain types of operations. Function can return value (int, double etc) or be void type - meaning they do not return value.

Functions allow to make code cleaner by moving out chunks of code of main body. For instance you want to write a function that finds area of rectangular.

#include <iostream>

using std cin;

using std cout;

using std endl;

using std get;

int main()

{

double sideA = 0.0;

cout << "Enter side a of rectagular: ";

cin >> sideA;

double sideB = 0.0;

cout << endl << "Enter side b of rectangular: ";

cin >> sideB;

//This part passes sides a and b to user defined function "Square"

cout << endl << "Area of rectangular is: " << Square(a, b);

cin.get();

return 0;

}

//definition of user defined function Square

double Square(double a, double b)

{

return (a * b);

}