function twoSum(nums,target){ let obj={}; if (nums.length < 2){ console.log('Ivalid input data!!!'); return; } for(let i=0;i<nums.length;i++){ if (nums[i] in obj){ console.log(obj[nums[i]],i); }else{ obj[target-nums[i]] = i; } } } twoSum([3,3],6);