This code calculates the **sum of all numbers** in the...

This code calculates the sum of all numbers in the array numbers. Here's how it works:

1. numbers.reduce(callback, initialValue):

   • The reduce method iterates through the elements of the numbers array and accumulates a single result.
   • It takes a callback function (here (acc, val) => acc + val) and an optional initialValue, which is 0 in this case.

2. Callback function:

   • The callback (acc, val) => acc + val:
     • acc is the accumulator that holds the running total.
     • val is the current element of the array being processed.
     • acc + val adds the current array element to the accumulator.

3. Initial Value:

   • The accumulator acc starts at 0, as specified by the second argument to reduce.

4. Process:

   • The reduce method iterates through all elements of numbers, adding each value to acc, and returns the final sum.

Example Usage:

If numbers = [1, 2, 3, 4], the result of this code will be:

• Initial value of acc = 0.
• First iteration: acc = 0 + 1 = 1.
• Second iteration: acc = 1 + 2 = 3.
• Third iteration: acc = 3 + 3 = 6.
• Fourth iteration: acc = 6 + 4 = 10.
• Result: sum = 10.

In summary, this code computes and returns the total sum of the elements in the numbers array.