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# What is Math.Sqrt() in C#? Arslan Bajwa

Grokking Modern System Design Interview for Engineers & Managers

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C# has a built-in Math class that provides useful mathematical functions and operations. The Math class has the Sqrt() function, which is used to compute the square root of a specified number.

## Syntax

public static double Sqrt (double value);

## Parameters

• value: value is of the Double type and represents the input value for which we have to find Sqrt(). Its range is all double numbers.

## Return value

• Double: Sqrt() returns a Double number representing the square root of the value.
• NaN: Sqrt() returns NaN type for negative numbers or NaN input in value.
• PositiveInfinity: Sqrt() returns PositiveInfinity for the PositiveInfinity input in value.

## Example

using System;class Educative{    static void Main()    {        Double result = Math.Sqrt(-0.16);        System.Console.WriteLine("Sqrt(0.16) = "+ result);        Double result1 = Math.Sqrt(0);        System.Console.WriteLine("Sqrt(0) = "+ result1);        Double result2 = Math.Sqrt(16);        System.Console.WriteLine("Sqrt(16) = "+ result2);        Double result3 = Math.Sqrt(Double.PositiveInfinity);        System.Console.WriteLine("Sqrt(∞) = "+ result3);        Double result4 = Math.Sqrt(Double.NegativeInfinity);        System.Console.WriteLine("Sqrt(-∞) = "+ result4);    }}

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CONTRIBUTOR Arslan Bajwa

Grokking Modern System Design Interview for Engineers & Managers

Ace your System Design Interview and take your career to the next level. Learn to handle the design of applications like Netflix, Quora, Facebook, Uber, and many more in a 45-min interview. Learn the RESHADED framework for architecting web-scale applications by determining requirements, constraints, and assumptions before diving into a step-by-step design process.

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