const variable is not binding in Angular 8

Question

Problem

• after binding const variable console.log print NAN.

Angular code

      function test() {
        let counter : any = 1;

        fields.forEach(elements => {

          console.log(elements.sub_scenarios.scenario_ + counter);

Output

NAN

This Worked

     console.log(elements.sub_scenarios.scenario_1);

Fields Array

        0:
        code: "type"
        field: "type"
        sub_scenarios:
        scenario_1: {}
        scenario_2: {}
        scenario_3: {}
        scenario_4: {}

• i Need to bind number to access object key elements.sub_scenarios.scenario_1

• i tried concat but it didn't work.

• problem occurs to harcode object

       elements.sub_scenarios.scenario_1
       elements.sub_scenarios.scenario_2
       elements.sub_scenarios.scenario_3
  
     .... so on
  

is suppose if looping 50 object in that case i need to use 50 times if condition then.

Thnaks

Answer 1

how about

console.log(elements.sub_scenarios['scenario_' + counter]);