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Satya sai sudhirSatya sai sudhir 

I created an apex class names "trippleInteger"."Arithmetic expressions must use numeric arguments " is the error Kindly help!

@RestResource(urlMapping='/trippleInteger')
  global class MyService {
    @HttpGet
    global static Integer trippleIt() {
        String someNumber = RestContext.request.params.get('yourInteger');
        return someNumber *3;
    }
}