JavaScript program to calculate square area and circumference

Following program shows you how to calculate square area and circumference.
This program gets square length from user and calculates area and circumference and prints them using following formulas
Area = length X length
Circumference = 4 X length

var squareLength = parseInt(prompt("Enter length of square:"));
var areaOfSquare = squareLength * squareLength;
console.log("Area of square is: " + areaOfSquare);
var circumferenceOfSquare = 4 * squareLength;
console.log("Circumference of square is: " + circumferenceOfSquare);

Output:

Enter length of square:
5
Area of square is: 25.0
Circumference of square is: 20.0