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Exists Method (Int32, Int32, Predicate(Int32))

Contract.Exists Method (Int32, Int32, Predicate(Of Int32))

Determines whether a specified test is true for any integer within a range of integers.

Namespace:  System.Diagnostics.Contracts
Assemblies:   mscorlib (in mscorlib.dll)
  System.Diagnostics.Contracts (in System.Diagnostics.Contracts.dll)

Public Shared Function Exists ( _
	fromInclusive As Integer, _
	toExclusive As Integer, _
	predicate As Predicate(Of Integer) _
) As Boolean


Type: System.Int32

The first integer to pass to predicate.

Type: System.Int32

One more than the last integer to pass to predicate.

Type: System.Predicate(Of Int32)

The function to evaluate for any value of the integer in the specified range.

Return Value

Type: System.Boolean
true if predicate returns true for any integer starting from fromInclusive to toExclusive - 1.


predicate is Nothing.


toExclusive is less than fromInclusive.

The toExclusive parameter is one more than the last integer to facilitate using the length of a range of integers starting at 0. For example, it would be set to 5 for integers 0 through 4.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8

Portable Class Library

Supported in: Portable Class Library
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