The Mod operator in Excel VBA gives the remainder of a division.
Place a command button on your worksheet and add the following code line:
MsgBox 7 Mod 2
Result when you click the command button on the sheet:
Explanation: 7 is divided by 2 (3 times) to give a remainder of 1.
MsgBox 8 Mod 2
Explanation: 8 is divided by 2 (exactly 4 times) to give a remainder of 0.
For a practical example of the mod operator, see our example program Prime Number Checker.