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### excel vba greatest common denominator

By Excel Hero on May 18, 2020
``````'VBA function to find the Greatest Common Denominator of two numbers:

Function GCD(ByVal a, ByVal b)      '<--Euclid's algorithm
a = Abs(a): b = Abs(b)
While b
If a > b Then a = a - b Else b = b - a
Wend
GCD = a
End Function

'------------------------------------------------------------------------------

MsgBox GCD(15, 20)          '<--displays: 5

'Note: the GCD() worksheet function is also available but requires the
'slow call to the worksheet calcuation engine:

MsgBox WorksheetFunction.GCD(15, 20)``````