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Random.NextDouble Method

Returns a random floating-point number that is greater than or equal to 0.0, and less than 1.0.

Namespace:  System
Assemblies:   mscorlib (in mscorlib.dll)
  System.Runtime.Extensions (in System.Runtime.Extensions.dll)

abstract NextDouble : unit -> float  
override NextDouble : unit -> float

Return Value

Type: System.Double
A double-precision floating point number that is greater than or equal to 0.0, and less than 1.0.

The actual upper bound of the random number returned by this method is 0.99999999999999978.

This method is the public version of the protected method, Sample.

The following example uses the NextDouble method to generate sequences of random doubles.

No code example is currently available or this language may not be supported.

The following example calls the NextDouble method to generate 100 random numbers and displays their frequency distribution.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.6, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, 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.

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