# Python Program to find sum of array

• Difficulty Level : Easy
• Last Updated : 13 Jun, 2022

Given an array of integers, find the sum of its elements. Examples :

```Input : arr[] = {1, 2, 3}
Output : 6
1 + 2 + 3 = 6

Input : arr[] = {15, 12, 13, 10}
Output : 50```

Method 1:

## Python3

 `# Python 3 code to find sum``# of elements in given array``def` `_sum(arr):``    ` `    ``# initialize a variable``    ``# to store the sum``    ``# while iterating through``    ``# the array later``    ``sum``=``0``    ` `    ``# iterate through the array``    ``# and add each element to the sum variable``    ``# one at a time``    ``for` `i ``in` `arr:``        ``sum` `=` `sum` `+` `i``        ` `    ``return``(``sum``)` `# driver function``arr``=``[]``# input values to list``arr ``=` `[``12``, ``3``, ``4``, ``15``]` `# calculating length of array``n ``=` `len``(arr)` `ans ``=` `_sum(arr)` `# display sum``print` `(``'Sum of the array is '``, ans)` `# This code is contributed by Himanshu Ranjan`

Output:

`Sum of the array is  34`

Time complexity: O(n)

Auxiliary Space: O(1)

Method 2:

## Python3

 `# Python 3 code to find sum``# of elements in given array``# driver function``arr ``=` `[]` `# input values to list``arr ``=` `[``12``, ``3``, ``4``, ``15``]` `# sum() is an inbuilt function in python that adds``# all the elements in list,set and tuples and returns``# the value``ans ``=` `sum``(arr)` `# display sum``print` `(``'Sum of the array is '``,ans)` `# This code is contributed by Dhananjay Patil`

Output:

`Sum of the array is  34`

Time complexity: O(n)

Auxiliary Space: O(1)

Please refer complete article on Program to find sum of elements in a given array for more details!

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