Introduction

The sum function is used to perform the addition of two or more values, which could be either numerical values or xpath expressions.

Syntax :

• ${ixf:sum(xpathExp1, xpathExp2)} calculates the sum of the results obtained from evaluating "xpathExp1" and "xpathExp2".
• ${ixf:sum(xpathExp,"10")} the result will be the sum of the result obtained from evaluating "xpathExp" and 10.
• ${ixf:sum("10","12","100")}  the result will be 122, which is the sum of the individual results of "10", "12", and "100".

Note:

Ensure that numerical values are between:

• Double quotes : ${ixf:sum("10","12","100")} 
• Single quotes : ${ixf:sum('10','12','100')} 
• Mixing both quotes : ${ixf:sum("10",'12','100')} 

while xpath expressions should remain without any quote enclosures.