What do you mean by the terms “Dimension” and “Subscript” when we talk about arrays?

"Dimension" and "Subscript" are two terms commonly used when discussing arrays in programming.

1. Dimension: In the context of arrays, a dimension represents a new level of depth. An array's dimension indicates how many indices you need to select an element. For example, a 1-dimensional array is a simple list of items, where each item can be accessed by a single index. A 2-dimensional array, on the other hand, can be thought of as a table, where each element is accessed by two indices (one for the row and one for the column).

2. Subscript: The subscript refers to the index used to access an element within the array. In a 1-dimensional array, there is one subscript. In a 2-dimensional array, there are two subscripts. The subscript is usually enclosed in square brackets following the name of the array. For example, in the array named 'a', a[3] would access the fourth element (assuming the array is zero-indexed).

In summary, the dimension of an array refers to the number of indices needed to access an element, and the subscript is the actual index or indices used to access these elements.