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Adding elements to an array in Python

Various methods to insert elements in an Array: Here, we are going to learn how to insert/add elements to an array in Python programming language. By IncludeHelp Last updated : January 14, 2024

Importing array module

An array can be declared by using "array" module in Python.

Syntax to import "array" module:

    import array as array_alias_name

Here, import is the command to import Module, "array" is the name of the module and "array_alias_name" is an alias to "array" that can be used in the program instead of module name "array".

Array declaration

To declare an "array" in Python, we can follow following syntax:

array_name = array_alias_name.array(type_code, elements)

Here,

• array_name is the name of the array.
• array_alias_name is the name of an alias - which we define importing the "array module".
• type_code is the single character value – which defines the type of the array elements is the list of the elements of given type_code.

Adding elements to an array

We can add elements to an array by using Array.insert() and Array.append() methods in Python.

Python program to add elements to an array

# Adding Elements to an Array in Python

# importing "array" modules
import array as arr

# int array
arr1 = arr.array("i", [10, 20, 30])

print("Array arr1 : ", end=" ")
for i in range(0, 3):
    print(arr1[i], end=" ")
print()

# inserting elements using insert()
arr1.insert(1, 40)

print("Array arr1 : ", end=" ")
for i in arr1:
    print(i, end=" ")
print()

# float array
arr2 = arr.array("d", [22.5, 33.2, 43.3])

print("Array arr2 : ", end=" ")
for i in range(0, 3):
    print(arr2[i], end=" ")
print()

# inserting elements using append()
arr2.append(54.4)

print("Array arr2 : ", end=" ")
for i in arr2:
    print(i, end=" ")
print()

Output

Array arr1 :  10 20 30
Array arr1 :  10 40 20 30
Array arr2 :  22.5 33.2 43.3
Array arr2 :  22.5 33.2 43.3 54.4