Math.Sqrt(Double) Math.Sqrt(Double) Math.Sqrt(Double) Math.Sqrt(Double) Method

Definition

Gibt die Quadratwurzel einer angegebenen Zahl zurück.Returns the square root of a specified number.

public:
 static double Sqrt(double d);
public static double Sqrt (double d);
static member Sqrt : double -> double
Public Shared Function Sqrt (d As Double) As Double

Parameter

d
Double Double Double Double

Die Zahl, deren Quadratwurzel bestimmt werden soll.The number whose square root is to be found.

Gibt zurück

Einer der Werte aus der folgenden Tabelle.One of the values in the following table.

d-Parameterd parameter RückgabewertReturn value
0 oder positivZero or positive Die positive Quadratwurzel von d.The positive square root of d.
NegativNegative NaN
Entspricht NaN.Equals NaNNaN
Entspricht PositiveInfinity.Equals PositiveInfinityPositiveInfinity

Beispiele

Die Quadratwurzel des Bereichs eines Quadrats stellt die Länge einer beliebigen Seite des Quadrats dar.The square root of the area of a square represents the length of any side of the square. Im folgenden Beispiel wird der Bereich einiger Städte in der USA angezeigt, und es wird ein Eindruck von der Größe der einzelnen Städte angezeigt, wenn Sie durch ein Quadrat dargestellt wird.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
Module Example
   Public Sub Main()
      ' Create an array containing the area of some squares.
      Dim areas() As Tuple(Of String, Double) = 
                     { 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}", "City", "Area (mi.)", 
                        "Equivalent to a square with:")
      Console.WriteLine()
      For Each 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))        
      Next
   End Sub
End Module
' 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

Gilt für:

Siehe auch