I have requirement with increment value for each iteration and using loop controller. I tried with the _V function and __intSum(${myVar},${__counter(,)},)}. it's incrementing only for digit and not for AlphaNum . my paylody body like this.
{
"name":"BAN401"
}
I'm using like below.
{
"name":${__intSum(${FirstName},${__counter(,)},)}"
}