Hi,
I have used a basic example where i have created a number varibale then incremented that followed by a comparision.
<!-- Number declaration -->
<core:set value="${0}" var="num_val1"/>
<core:set value="${5}" var="num_val2"/>
<gel:log>Number Variable1 is ${num_val1}</gel:log>
<gel:log>Number Variable2 is ${num_val2}</gel:log>
<!-- Number variale modification -->
<core:set value="${num_val1+3}" var="num_val1"/>
<gel:log>Number after adding 3 to varibale1 value is ${num_val1}</gel:log>
<!-- Number compasrison -->
<core:if test="${num_val1 > 2}">
<gel:log>Number ${num_val1} is greater than two</gel:log>
</core:if>
<!-- Number compasrison -->
<core:if test="${num_val2 > num_val1}">
<gel:log>Number varible2 value: ${num_val2} is greater than variable number value: ${num_val1}</gel:log>
</core:if>
Let me know if this helps.
Regards,
Prashank Singh