C# program to calculate square area and circumference

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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

using System;

class MainClass {
  public static void Main (string[] args) {
    Console.WriteLine ("Enter length of square:");
    double squareLength = Convert.ToDouble(Console.ReadLine());

    double areaOfSquare = squareLength * squareLength;
    Console.WriteLine("Area of square is: " + areaOfSquare);

    double circumferenceOfSquare = 4 * squareLength;
    Console.WriteLine("Circumference of square is: " + circumferenceOfSquare);

  }
}

Output:

Enter length of square:
 12
Area of square is: 144
Circumference of square is: 48
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