//The return statement ends function execution,

//and specifies a value to be returned to the function caller.

function getRectArea(width, height) {

  if (width > 0 && height > 0) {

    return width * height;

  }

  return 0;

}

​

console.log(getRectArea(3, 4));

// expected output: 12

console.log(getRectArea(-3, 4));

// expected output: 0

function test(arg){

    return arg;

}

function test()

{

    return function x()

    {

        return "xxxxxxxx"

    }

}

​

console.log(test())

//[Function: x()]

console.log(test()())

//xxxxxxxx

return [expression];

/* The return statement ends a function immediately at the 

point where it is called. */

​

function counter() {

  for (var count = 1; count < 5 ; count++) {

    console.log(count + 'A');

    if (count === 3) return; // ends entire counter function

    console.log(count + 'B');

    }

  console.log(count + 'C'); // never appears

}

​

counter();

// 1A

// 1B

// 2A

// 2B

// 3A

// program to add two numbers

// declaring a function

function add(a, b) {

    return a + b;

}

​

// take input from the user

let number1 = parseFloat(prompt("Enter first number: "));

let number2 = parseFloat(prompt("Enter second number: "));

​

// calling function

let result = add(number1,number2);

​

// display the result

console.log("The sum is " + result);

Function.prototype.method = function (name, func) {

  this.prototype[name] = func;

  return this;

};

function add(a, b) {

  return a + b; //Return stops the execution of this function

}

​

var sum = add(5, 24); //The value that was returned got but inside the variable sum

function square(x) {

   return x * x;

}

var demo = square(3);

// demo will equal 9