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Decimal to Binary Function

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Submitted on: 10/15/2018 1:43:58 PM
By: Paul Bahlawan 
Level: Beginner
User Rating: By 1 Users
Compatibility: VB 6.0
Views: 1734
 
     A straightforward function to convert a decimal number to binary.Example: DecToBin(123) returns 01111011 and DecToBin(Asc("a")) returns 01100001
 
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'**************************************
' Name: Decimal to Binary Function
' Description:A straightforward function to convert a decimal number to binary.Example: DecToBin(123) returns 01111011 and DecToBin(Asc("a")) returns 01100001
' By: Paul Bahlawan
'**************************************

'Decimal to Binary
'Returns a string representation of binary
'Paul Bahlawan
Public Function DecToBin(dec As Integer) As String
If dec = 0 Then
DecToBin = "0"
Else
Do While dec <> 0
If dec Mod 2 = 0 Then
DecToBin = "0" & DecToBin
Else
DecToBin = "1" & DecToBin
End If
dec = dec \ 2
Loop
End If
DecToBin = Format$(DecToBin, "00000000")
End Function


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Other User Comments

11/26/2018 6:37:07 AMRde

Hi Paul

Good demo, simple and does exactly what you say.
However, I saw the many string concatenations
which we know is very slow, and tried to come up
with a way without any string concatenation:

Function Dec2Bin(ByVal dec As Integer) As String
Dim idx As Integer
idx = 8
Dec2Bin = String$(idx, "0")
Do Until dec = 0
Mid$(Dec2Bin, idx) = CStr(dec Mod 2)
idx = idx - 1
dec = dec \ 2
Loop
End Function

Similar to what you had, but should be much faster.
Happy coding,
Rd :)

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11/26/2018 6:42:09 AMRde

Sorry, should be
idx = 16
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11/26/2018 6:44:25 AMRde

And of course your format code to
trim off all left hand zeroes

Happy coding :)
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12/15/2018 5:32:45 PMPaul Bahlawan

Thats awsome RDE - I never thought to do it that way.
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