Variables and Named Variables can be used on any of the numeric statements:

Increment named variable 'Counter'

Named Variables are created when first set and are empty, or 0, until created. The above Increment statement will create the Named Variable if it does not exist. So the first Increment will set it to 1.

You can use a Compare Numeric Test statement to test the value.

Test if the numeric value of named variable 'Counter' > "5" (Set result)
if true
...
endif