JS recursive summation 1-100

       function fn(num1,num2){
            let sum = num1+num2 ;
            if(num2+1>100){
                return sum;
            }else{
                return fn(sum,num2+1)
            }
        }
        let sum = fn(1,2)
        console.log(sum);

Pass in the method from （1,2） Numbers .sum=1+2; here num2+1=2 Less than 100.

Then... Is passed into the method （3,3）. here sum=1+2+3.num2+1=3 Less than 100.

Continue to repeat the above operation to pass... Into the method （6,4） here sum=1+2+3+4.num2+1=4 Less than 100.

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When num=101 Jump out of the loop , Get the final result value 5050