Math.Sqrt Method
Returns the square root of a specified number.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Parameters
- d
- Type: System.Double
The number whose square root is to be found.
Return Value
Type: System.DoubleOne of the values in the following table.
d parameter | Return value |
|---|---|
Zero or positive | The positive square root of d. |
Negative | |
Equals NaN | |
Equals PositiveInfinity |
The square root of the area of a square represents the length of any side of the square. The following example displays the area of some cities in the United States and gives an impression of each city's size if it were represented by a square.
using System; public class Example { public static void Main() { // Create an array containing the area of some squares. Tuple<string, double>[] areas = { Tuple.Create("Sitka, Alaska", 2870.3), Tuple.Create("New York City", 302.6), Tuple.Create("Los Angeles", 468.7), Tuple.Create("Detroit", 138.8), Tuple.Create("Chicago", 227.1), Tuple.Create("San Diego", 325.2) }; Console.WriteLine("{0,-18} {1,14:N1} {2,30}\n", "City", "Area (mi.)", "Equivalent to a square with:"); foreach (var area in areas) Console.WriteLine("{0,-18} {1,14:N1} {2,14:N2} miles per side", area.Item1, area.Item2, Math.Round(Math.Sqrt(area.Item2), 2)); } } // The example displays the following output: // City Area (mi.) Equivalent to a square with: // // Sitka, Alaska 2,870.3 53.58 miles per side // New York City 302.6 17.40 miles per side // Los Angeles 468.7 21.65 miles per side // Detroit 138.8 11.78 miles per side // Chicago 227.1 15.07 miles per side // San Diego 325.2 18.03 miles per side
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
