VBScript Function to Convert an Integer to Binary String Representation

Given a Integer, we want to convert it to binary string. We can do this iteratively, by concatenating the modulus by two result and shifting the number 1 position to the right. We also need to check if it is negative number and appending a ‘-‘ sign before the result accordingly.

Implementing the ToBinaryString in VBScript is as follows. The zero is a special case. And to shift an integer one position to the right. We can use the Int(Num/2). The CInt() function will round up the values for example, CInt(3.5) is 4. Thus the Int() function in VBScript is equivalent to the Floor Function.

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Function ToBinaryString(ByVal Num)
    Dim s, sign: sign = ""
    If Num < 0 Then 
        sign = "-"
        Num = -Num
    ElseIf Num = 0 Then
        ToBinaryString = "0"
        Exit Function
    End If
    While Num > 0
        s = Chr(48 + (Num Mod 2)) & s
        Num = Int(Num / 2)
    Wend 
    ToBinaryString = sign & s
End Function

Function ToBinaryString(ByVal Num)
	Dim s, sign: sign = ""
	If Num < 0 Then 
		sign = "-"
		Num = -Num
	ElseIf Num = 0 Then
		ToBinaryString = "0"
		Exit Function
	End If
	While Num > 0
		s = Chr(48 + (Num Mod 2)) & s
		Num = Int(Num / 2)
	Wend 
	ToBinaryString = sign & s
End Function

The results are shown in the VBSEdit IDE – and you can verify a few integers from negative 15 to positive 15, respectively.

vbscript-convert-integer-to-binary-in-vbsedit

–EOF (The Ultimate Computing & Technology Blog) —