Checking whether a number is a prime number

by Abdul Jalil (1 Submission)
Category: Math/Dates
Compatability: VB 6.0
Difficulty: Unknown Difficulty
Originally Published: Mon 5^th June 2000
Date Added: Mon 8^th February 2021
Rating: (1 Votes)

Rate Checking whether a number is a prime number



Dim primNum As Integer
Dim i As Integer
Dim isPrime As Boolean
isPrime = True

primNum = Val(Text1.Text)
For i = 2 To (primNum - 1)
    If primNum Mod i = 0 Then
        isPrime = False
    End If
Next

If isPrime = False Then
    Picture1.Print Str(primNum) + " Not a prime number"
Else
    Picture1.Print Str(primNum) + " Is a prime number"
End If
End Sub

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