How to declare array in python?

An array is basically a data structure which can hold one value at a time. It is a collection or ordered series of elements of the same type.

Many of us gets confused whether list and arrays are the same or not.

Arrays and lists have the same way of storing data.
Arrays take only a single data type elements but lists can have any type of data.
Other than a few operations, the kind of operations performed on them are different.

Array in python can be created after importing the array module.

e.g.,

import array
arr=array.array('i', [1,2,3])
print(arr)

Finding the length of array- Length of an array is the number of elements that are actually present in an array. We can use the function len() to achieve it.

syntax:-

import array
a=arr.array('i', [a1, a2, a3])
len(a)

Adding/ changing an element- Functions used to add element to an array are append(), insert() and extend().

e.g.,

import array
a=array.array('i', [1,2,3])
a.append(5)
print(a)
a.extend([4,5,6])
print(a)
a.insert(2, 7)
print(a)

Removing an element- Functions used to remove or delete an element of an array are pop() and remove()

e.g.,

import array
a=array.array('i', [1,2,3,4,5,6,7])
print(a.pop(2))
a.remove(7)
print(a)

This is all about arrays in python.

Python