Python Program to Remove the last element from an Array

There are three different ways in order to delete or remove the element. Let us discuss some of those methods and keywords that are used to remove the last element from an array one after another in a row.

Using Delete() Method of the Numpy Module

This module can be used in order to delete an element of an array when an index is clearly specified. This operation can be done by the delete() method that belongs to the module numpy. But, in order to use that delete method, the array should be created in the form of Numpy Array.

Working of Delete() Method

The delete() method is used to remove the element of the array or the list by mentioning the index of the element that should be removed. The syntax of the usage of the method delete() is described below.

Syntax

variable = n.delete(arr, last_index)

Example

In this example, we are going to discuss about the process of removing the last element of an array by using delete() method of Numpy module.

import numpy as n
arr = [" Hello ", " Programming ", " Python ", " World ", " Delete ", " Element "]
variable = n.array(arr)
max_size = len(variable)
last_index = max_size - 1
print(" The elements of the array before deletion: ")
print(variable)
variable = n.delete(arr, last_index)
print(" The elements of the array after deletion: ")
print(variable)

Output

The output of the above program is as follows −

The elements of the array before deletion: 
[' Hello ', ' Programming ', ' Python ', ' World ', ' Delete ', ' Element ']
The elements of the array after deletion:
[' Hello ', ' Programming ', ' Python ', ' World ', ' Delete ']

Using “ del ” Keyword

The keyword del is used to delete the objects in Python programming language. Not only objects, the keyword del can also be used to delete the elements of the lists, arrays, etc. Let us use this keyword and delete the last element of the array.

Syntax

del arr[last_index]

Example

In this example, we are going to discuss about the process of removing the last element of an array by using del keyword.

arr = [" Hello ", " Programming ", " Python ", " World ", " Delete ", " Element "]
max_size = len(arr)
last_index = max_size – 1

print(" The elements of the array before deletion: ")
print(arr)

print(" The elements of the array after deletion: ")
del arr[last_index]
print(arr)

Output

The output of the above program is as follows −

The elements of the array before deletion: 
[' Hello ', ' Programming ', ' Python ', ' World ', ' Delete ', ' Element ']
The elements of the array after deletion:
[' Hello ', ' Programming ', ' Python ', ' World ', ' Delete ']

By Using pop() Method

The method pop() is used to delete the elements of the arrays, lists, etc in Python programming language. This mechanism works with the usage of the index of the element that must be removed or deleted from the array. The element simply pops up from the array and will be removed. Let us use this method and delete the last element of the array.

Syntax

arr.pop(last_index)

Example

In this example, we are going to discuss about the process of removing the last element of an array by using pop() method

arr = [" Hello ", " Programming ", " Python ", " World ", " Delete ", " Element "]
max_size = len(arr)
last_index = max_size -1
print(" The elements of the array before deletion: ")
print(arr)
print(" The elements of the array after deletion: ")
arr.pop(last_index)
print(arr)

Output

The output of the above program is as follows −

The elements of the array before deletion: 
[' Hello ', ' Programming ', ' Python ', ' World ', ' Delete ', ' Element ']
The elements of the array after deletion:
[' Hello ', ' Programming ', ' Python ', ' World ', ' Delete ']

Conclusion

We can observe that the outputs of all three programs that are discussed above are completely equal which proves that the last element is successfully removed from the array by using all three ways. In this way, the deletion of an element of any index in an array can performed very easily by using simple techniques.