Given a list of numbers, write a Python program to find the sum of all the elements in the list.
Example:
Input: [12, 15, 3, 10]
Output: 40Input: [17, 5, 3, 5]
Output: 30
Python program to find sum of elements in list
Example #1:
Python3
# Python program to find sum of elements in listtotal = 0# creating a listlist1 = [11, 5, 17, 18, 23]# Iterate each element in list# and add them in variable totalfor ele in range(0, len(list1)): total = total + list1[ele]# printing total valueprint("Sum of all elements in given list: ", total) |
Sum of all elements in given list: 74
Time Complexity: O(N), Here N is the number of elements in the list.
Auxiliary Space: O(1), As constant extra space is used.
Example #2 : Using while() loop
Python3
# Python program to find sum of elements in listtotal = 0ele = 0# creating a listlist1 = [11, 5, 17, 18, 23]# Iterate each element in list# and add them in variable totalwhile(ele < len(list1)): total = total + list1[ele] ele += 1 # printing total valueprint("Sum of all elements in given list: ", total) |
Sum of all elements in given list: 74
Time Complexity: O(N), Here N is the number of elements in the list.
Auxiliary Space: O(1), As constant extra space is used.
Example #3: Recursive way
Python3
# Python program to find sum of all# elements in list using recursion# creating a listlist1 = [11, 5, 17, 18, 23]# creating sum_list functiondef sumOfList(list, size): if (size == 0): return 0 else: return list[size - 1] + sumOfList(list, size - 1)# Driver codetotal = sumOfList(list1, len(list1))print("Sum of all elements in given list: ", total) |
Sum of all elements in given list: 74
Time Complexity: O(N), Here N is the number of elements in the list.
Auxiliary Space: O(1), As constant extra space is used.
Example #4: Using sum() method
Python3
# Python program to find sum of elements in list# creating a listlist1 = [11, 5, 17, 18, 23]# using sum() functiontotal = sum(list1)# printing total valueprint("Sum of all elements in given list: ", total) |
Sum of all elements in given list: 74
Time Complexity: O(N), Here N is the number of elements in the list.
Auxiliary Space: O(1), As constant extra space is used.
Example 5: Using add() function of operator module
First we have to import the operator module then using the add() function of operator module adding the all values in the list.
Python3
# Python 3 program to find the sum of all elements in the# list using add function of operator modulefrom operator import*list1 = [12, 15, 3, 10]result = 0for i in list1: # Adding elements in the list using # add function of operator module result = add(i, result)# printing the resultprint(result) |
40
Time Complexity: O(N), Here N is the number of elements in the list.
Auxiliary Space: O(1), As constant extra space is used.
Method 6: Using enumerate function
Python3
list1 = [12, 15, 3, 10];s=0for i,a in enumerate(list1): s+=aprint(s) |
40
Time Complexity: O(N), Here N is the number of elements in the list.
Auxiliary Space: O(1), As constant extra space is used.
Method 7: Using list comprehension
Python3
list1 = [12, 15, 3, 10]s=[i for i in list1]print(sum(s)) |
40
Time Complexity: O(N), Here N is the number of elements in the list.
Auxiliary Space: O(1), As constant extra space is used.
Method 8: Using lambda function
Python3
list1 = [12, 15, 3, 10]print(sum(list(filter(lambda x: (x),list1)))) |
40
Time Complexity: O(N), Here N is the number of elements in the list.
Auxiliary Space: O(1), As constant extra space is used.
Method: Using add operator
Python3
import operatorlist1 = [12, 15, 3, 10] ;s=0for i in list1: s=s+operator.add(0,i)print(s) |
40
Time Complexity: O(N), Here N is the number of elements in the list.
Auxiliary Space: O(1), As constant extra space is used.
Method : Using add()+while loop
Algorithm :
Import the operator module.
Create a list of integers and assign it to the variable lst.
Initialize a variable sum to 0 to keep track of the sum.
Initialize a variable i to 0 to use as the loop counter.
Use a while loop to traverse the list.
Inside the loop, add the value at the current index of the list to the sum using the add() method of the operator module.
Increment the loop counter i by 1 in each iteration.
Print the sum of the list elements using the print() function and a message.
Python3
# Python program to find sum of elements in the list# Importing the operator moduleimport operator# Initializing the valueslst = [0, 4, 1, 6, 8]sum = 0i = 0# Traversing the list using while loop finding the sum using add()while i < len(lst): sum = sum+operator.add(0, lst[i]) i = i+1# printing the sum of list elementsprint('The sum of elements in the given list is:', sum)# This code is contributed by SHAIK HUSNA |
The sum of elements in the given list is: 19
Time Complexity : O(n)
Auxiliary Space : O(1)
