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VB.Net program to demonstrate the IsNullorEmpty() method of String class

By Nidhi Last Updated : November 11, 2024

String.IsNullorEmpty() Method in VB.Net

The IsNullorEmpty() method is used to check the specified string is empty or not.

Syntax

Function IsNullorEmpty(ByVal str as String) as Boolean

Parameter(s)

• Str: Specified string to check the emptiness.

Return Value

It returns the Boolean value, it returns true when the specified string is empty. Otherwise, it will return false.

VB.Net code to demonstrate the example of String.IsNullorEmpty() method

The source code to demonstrate the IsNullorEmpty() method of the String class is given below. The given program is compiled and executed successfully.

'VB.NET program to demonstrate the IsNullorEmpty() 
'method of String class.

Imports System

Module Module1
    Sub Main()
        Dim str1 As String = Nothing
        Dim str2 As String = "Hello World"
        Dim ret As Boolean

        ret = String.IsNullOrEmpty(str1)

        If ret = True Then
            Console.WriteLine("Strings str1 is empty")
        Else
            Console.WriteLine("Strings str1 is not empty")
        End If

        ret = String.IsNullOrEmpty(str2)
        If ret = True Then
            Console.WriteLine("Strings str2 is empty")
        Else
            Console.WriteLine("Strings str2 is not empty")
        End If
    End Sub
End Module

Output

Strings str1 is empty
Strings str2 is not empty
Press any key to continue . . .

Explanation

In the above program, we created a module Module1 that contains the Main() function. The Main() function is the entry point for the program.

In the Main() function, we created two strings str1 and str2. Here, we check the emptiness of strings using the IsNullorEmpty() method of the String class and then printed the appropriate message on the console screen.

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