Answer:
The first element of an array in most programming languages is referred to with the index number 0. Some programming languages may use 1 as the first index value, but the majority of programming languages use 0 as the first index.
The use of 0 as the first index in an array is based on the idea of zero-based indexing. In zero-based indexing, the first element of an array is assigned the index 0, the second element is assigned the index 1, and so on. This convention is used in many programming languages because it simplifies the calculation of an element's position in an array. For example, to access the nth element of an array with zero-based indexing, you would use the index n-1. This makes it easy to access any element in an array, because you can simply subtract 1 from the desired index to calculate the corresponding array index.
In contrast, some programming languages use 1-based indexing, where the first element of an array is assigned the index 1, the second element is assigned the index 2, and so on. This convention can be more intuitive for some people, because it matches the way that people typically count objects in the real world. However, it can also be more complex to work with, because it requires you to add 1 to the desired index to calculate the corresponding array index.