You can determine if a number is an integer by performing:

<CFIF (foo \ 2) * 2 IS foo>

If the statement is true, you have an integer. However, you seem to be trying

to discriminate between multiples of 4.

You might want to do the following:

<CFIF foo mod 4 IS 0>

IF the statement is true, you have a multiple of 4.

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