How to increment value of json variable in Jmeter

Question

I have a Loop controller and inside i have a http request and payload . PayloadBody Looks like below.

{
"id"="12345"
}

In the counter if i have 3 it should be 12346,12347 I need to increase value of a variable each time when iterates. i used the below JSR223 script as below

int counter=(vars.get('ContactId') as int) +1
vars.put('counter',counter as String)
log.info(vars.get('counter'))

it's taking next digit but same value in the counter it's not increasing as +1.

Answer 1

The easiest solution is changing your 12345 part to __intSum() and __counter() functions combination, i.e. something like:

{
"id"="${__intSum(12345,${__counter(,)},)}"
}

This way you will get an incremented number each time the request is sent

More information: How to Use a Counter in a JMeter Test