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Math.Sqrt(Double) Metode

Definisi

Menghasilkan akar kuadrat dari suatu bilangan.

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

Angka yang akar kuadratnya akan ditemukan.

Mengembalikan

Salah satu nilai dalam tabel berikut ini.

parameter d Menampilkan nilai
Nol atau positif Akar kuadrat positif dari d.
NegatifNaN
Sama NaNNaN
Sama PositiveInfinityPositiveInfinity

Contoh

Akar kuadrat dari area persegi mewakili panjang sisi mana pun dari persegi. Contoh berikut menampilkan area beberapa kota di Amerika Serikat dan memberikan kesan tentang ukuran setiap kota jika diwakili oleh persegi.

// 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
open System

// Create a list containing the area of some cities.
let areas =
    [ "Sitka, Alaska", 2870.3
      "New York City", 302.6
      "Los Angeles", 468.7
      "Detroit", 138.8
      "Chicago", 227.1
      "San Diego", 325.2 ]

printfn "%-18s %14s} %2s\n" "City" "Area (mi.)" "Equivalent to a square with:"

for city, area in areas do
    printfn $"{city,-18} {area,14:N1} {Math.Round(Math.Sqrt(area), 2),14:N2} miles per side"

// 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

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