Intsum function is used to find the sum of two or more integer values.

Add a new Thread Group and add a Java request.In its name add

 ${__intsum(2,5)} 

or we can add two java reqs and in one req type the

 ${__intsum(2,5),result}  

and in next java req use that string i.e type in its name

 ${result}

Or we can make two variables in test plan ,give then names like x and y and values like 5,10.

Then in java req we can give the function

 {$__intSum(${x},${y})} 

Then let us add a if controller to the thread group after our java reqs and in this if controller and in its condition type

 {$__intSum(${x},${y})}>20 

{$__intSum(${x},${y})}

i.e run this java req and type the result of initSum func in its name only if the result of initSum is more than 20.

We can even add a http req and in Server name type

 www.xyz.com 

${result}