numerical indexing

Numerical indexing refers to accessing elements or values in an array, list, or matrix using numerical indices or positions. In other words, each element in the data structure is assigned a unique number that represents its position or index, and this number is used to retrieve or modify the element. The index usually starts from 0 in most programming languages. For example, in Python, we can use numerical indexing to access elements in a list as follows:

my_list = [1, 2, 3, 4, 5]
print(my_list[0])  # output: 1
print(my_list[2])  # output: 3

Here, `my_list[0]` accesses the first element in the list (which is 1), and `my_list[2]` accesses the third element in the list (which is 3).