Since the array is already sorted, and we're looking to process an index at each iteration, we can use two pointers to process them faster. One pointer starts from the beginning of the array, and the other pointer begins from the end of the array, and then we add the values at these pointers.

Once we're set up, what we want to do is check if the current pointers already sum up to our target. This might happen if the correct ones are on the exact opposite ends of the array.

Here's what the check might look like:

1let sum = arr[i] + arr[j];
2if (sum === target) {
3    return [i + 1, j + 1];
4}

These snippets implement the logic to check if the sum of two numbers from an array equals the target value, returning the appropriate result. In Python, the code snippet returns a boolean value, while the other languages return the indices or values of the two numbers that add up to the target.