Multiple_pointer.js

function sumZero(arr){
	let left = 0;
	let right = arr.length - 1;
	//Moving from left and right to middle
	while(left < right){ 
		//First element + Last element
		let sum = arr[left] + arr [right];
		if(sum === 0){
			//Found a first matching pair
			return [arr[left], arr[right]];
		} else if(sum > 0){
			// Move to next right element
			right--; 
		} else {
			// Move to next left element
			left++;
		}
	}
}

sumZero ([-4,-3,-2,-1,0,1,2,3,10]);