## C# Math.Sqrt() – Examples

In this tutorial, we will learn about the C# Math.Sqrt() method, and learn how to use this method to find the square root of given number, with the help of examples.

## Sqrt(Double)

Math.Sqrt(d) returns the square root of a specified number `d`.

### Syntax

The syntax of Sqrt() method is

`Math.Sqrt(Double d)`

where

Return Value

The method returns Double value.

### Example 1 – Sqrt(Double)

In this example, we will find the square root of some numbers using Sqrt() method.

C# Program

```using System;

class Example {
static void Main(string[] args) {
Double d, result;

d = 2;
result = Math.Sqrt(d);
Console.WriteLine(\$"Sqrt({d}) = {result}");

d = 3;
result = Math.Sqrt(d);
Console.WriteLine(\$"Sqrt({d}) = {result}");

d = 4;
result = Math.Sqrt(d);
Console.WriteLine(\$"Sqrt({d}) = {result}");

d = 9;
result = Math.Sqrt(d);
Console.WriteLine(\$"Sqrt({d}) = {result}");

d = 16;
result = Math.Sqrt(d);
Console.WriteLine(\$"Sqrt({d}) = {result}");

d = 0.25;
result = Math.Sqrt(d);
Console.WriteLine(\$"Sqrt({d}) = {result}");

d = Double.NegativeInfinity;
result = Math.Sqrt(d);
Console.WriteLine(\$"Sqrt({d}) = {result}");

d = Double.PositiveInfinity;
result = Math.Sqrt(d);
Console.WriteLine(\$"Sqrt({d}) = {result}");
}
}```

Output

```Sqrt(2) = 1.4142135623731
Sqrt(3) = 1.73205080756888
Sqrt(4) = 2
Sqrt(9) = 3
Sqrt(16) = 4
Sqrt(0.25) = 0.5
Sqrt(-∞) = NaN
Sqrt(∞) = ∞```

### Conclusion

In this C# Tutorial, we have learnt the syntax of C# Math.Sqrt() method, and also learnt how to use this method with the help of C# example programs.