How to delete the last three elements from an integer array?Note: In the options, n is the size of the array, and "arr" is the name of the 1D ar

Here is a step-by-step guide on how to delete the last three elements from an integer array:

1. First, you need to check if the array has at least three elements. If not, you cannot delete the last three elements.

2. If the array has at least three elements, you can proceed to delete the last three elements. In most programming languages, arrays are fixed in size, so you cannot technically delete elements from them. However, you can achieve the same effect by creating a new array that contains all the elements of the original array except the last three.

Here is how you can do it in Python:

if n >= 3:
    new_arr = arr[:-3]
else:
    print("The array has less than three elements.")

In this code, arr[:-3] creates a new array that contains all the elements of arr except the last three. The :-3 is a slicing operation that selects all elements from the start of the array to the third last element.

3. If you want to keep using the same array arr instead of creating a new one, you can overwrite arr with new_arr:

if n >= 3:
    arr = arr[:-3]
else:
    print("The array has less than three elements.")

Now arr contains all the elements it had before except the last three.