I think it's because array sizes are exactly as numbered
i.e a[5] will create 0-4.
rather than B3D giving 0-5.
To loop 1 to 5 they've simply added an extra element to the array.
i.e a[5] will create 0-4.
rather than B3D giving 0-5.
To loop 1 to 5 they've simply added an extra element to the array.