Math.Sqrt Method (Double)
.NET Framework (current version)
Returns the square root of a specified number.
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
Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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