# C# Program - Square Root of a Number

If a number is multiplied by itself ($n*n$), the final number will be the square of that number and finding the square root of a number is inverse operation of squaring the number. If x is the square root of y, it can be expressed as below:

$x = \sqrt{y}$

Alternatively, it can also be expressed as:

$x^2 = y$

### Example: Using Sqrt() method of C# Math Class

The Sqrt() method of C# Math class can be used to return square root of a number.

using System;

namespace MyApplication {
class MyProgram {
static void Main(string[] args) {
double x = 16;
double y = 25;

//Sqrt() takes double datatype as argument
double x1 = Math.Sqrt(x);
double y1 = Math.Sqrt(y);
Console.WriteLine("Square root of " + x + " is " + x1);
Console.WriteLine("Square root of " + y + " is " + y1);
}
}
}


Output

Square root of 16.0 is 4.0
Square root of 25.0 is 5.0


### Example: Using Pow() method of C# Math Class

The Pow() method of C# Math class can also be used to calculate square root of a number.

using System;

namespace MyApplication {
class MyProgram {
static void Main(string[] args) {
double x = 16;
double y = 25;

//Pow() takes double datatype as argument
double x1 = Math.Pow(x, 0.5);
double y1 = Math.Pow(y, 0.5);
Console.WriteLine("Square root of " + x + " is " + x1);
Console.WriteLine("Square root of " + y + " is " + y1);
}
}
}


Output

Square root of 16.0 is 4.0
Square root of 25.0 is 5.0