Public Class PrimeForm Private Sub btnCheck_Click(sender As Object, e As EventArgs) Handles btnCheck.Click Dim num As Integer If Integer.TryParse(txtInput.Text, num) AndAlso num > 1 Then Dim isPrime As Boolean = True For i As Integer = 2 To Math.Sqrt(num) If num Mod i = 0 Then isPrime = False Exit For End If Next If isPrime Then lblOutput.Text = num & " is a Prime Number." Else lblOutput.Text = num & " is a Composite Number." End If Else lblOutput.Text = "Please enter an integer greater than 1." End If End Sub End Class Use code with caution. Common Error & Fix
Public Class Box Private length As Double Private breadth As Double ' FIX: Default Constructor uses 'Sub New' Public Sub New() length = 1.0 breadth = 1.0 End Sub ' FIX: Overloaded Constructor using 'Me' to distinguish class fields from parameters Public Sub New(length As Double, breadth As Double) Me.length = length Me.breadth = breadth End Sub Public Function CalculateArea() As Double Return length * breadth End Function End Class Use code with caution. Troubleshooting Checklist for BCA Lab Exams vb net lab programs for bca students fix
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