JavaScript program to take a number as input and calculate the square of that number

Following program shows how to take a number as input and calculate the square of that number.
In this program we get input from user and prints square of that number using following formula
Square of number = input X input

var input = prompt("Please enter a number:");
var result = input * input;
console.log("Squre of " + input + " is: " + result);

Output:

Please enter a number:
3
Squre of 3 is: 9