Python Program to find Sum of Elements in a List

In this article, we will show you, How to write a Python Program to find Sum of Elements in a List with practical example. Before you start, please refer List article to understand everything about Lists.

Python Program to find Sum of Elements in a List

This python program allows user to enter the length of a List. Next, we used For Loop to add numbers to the list.

TIP: Python sum function is used to return the sum of all the elements in a List

# Python Program to find Sum of all Elements in a List

NumList = []

Number = int(input("Please enter the Total Number of List Elements : "))
for i in range(1, Number + 1):
    value = int(input("Please enter the Value of %d Element : " %i))
    NumList.append(value)

total = sum(NumList)

print("\n The Sum of All Element in this List is : ", total)

OUTPUT

Python Program to find Sum of Elements in a List without using sum

In this program, we are using For Loop to iterate each and every element in this List. Inside the loop we are adding those elements to total variable.

# Python Program to find Sum of all Elements in a List

NumList = []
total = 0

Number = int(input("Please enter the Total Number of List Elements : "))
for i in range(1, Number + 1):
    value = int(input("Please enter the Value of %d Element : " %i))
    NumList.append(value)

for j in range(Number):
    total = total + NumList[j]

print("\n The Sum of All Element in this List is : ", total)

OUTPUT

Python Program to find Sum of Elements in a List using While loop

This is same as above. We just replaced the For Loop with While loop.

# Python Program to find Sum of all Elements in a List

NumList = []
total = 0
j = 0

Number = int(input("Please enter the Total Number of List Elements : "))
for i in range(1, Number + 1):
    value = int(input("Please enter the Value of %d Element : " %i))
    NumList.append(value)

while(j < Number):
    total = total + NumList[j]
    j = j + 1
print("\n The Sum of All Element in this List is : ", total)

OUTPUT

Python Program to find Sum of all Elements in a List using Functions

This program is same as first example. However, we separated the logic using Functions

# Python Program to find Sum of all Elements in a List

def sum_of_list(NumList):
    total = 0
    for j in range(Number):
        total = total + NumList[j]
    return total


NumList = []
Number = int(input("Please enter the Total Number of List Elements : "))
for i in range(1, Number + 1):
    value = int(input("Please enter the Value of %d Element : " %i))
    NumList.append(value)

total = sum_of_list(NumList)
print("\n The Sum of All Element in this List is : ", total)

OUTPUT