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Python Program to find sum of array

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  • 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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