Python: Compute the sum of digits of each number of a given list

Last update on April 19 2025 12:58:37 (UTC/GMT +8 hours)

Sum of Digits in List Numbers

Write a Python program to compute the sum of digits of each number in a given list.

Sample Solution:

Python Code:

# Define a function 'sum_of_digits' that calculates the sum of digits in a list of integers
def sum_of_digits(nums):
    # Use a nested generator expression to iterate over elements in 'nums'
    # Convert each element to a string and iterate over its characters
    # Use 'isdigit()' to check if a character is a digit, convert it to an integer, and sum them
    return sum(int(el) for n in nums for el in str(n) if el.isdigit())

# Create a list of integers 'nums'
nums = [10, 2, 56]

# Print a message indicating the original list
print("Original tuple:")
print(nums)

# Print a message indicating the operation to calculate the sum of digits in the list
print("Sum of digits of each number of the said list of integers:")
# Call the 'sum_of_digits' function with 'nums' and print the result
print(sum_of_digits(nums))

# Create another list with a mix of integers and non-integer values
nums = [10, 20, 4, 5, 'b', 70, 'a']

# Print a message indicating the original list
print("\nOriginal tuple:")
print(nums)

# Print a message indicating the operation to calculate the sum of digits in the list
print("Sum of digits of each number of the said list of integers:")
# Call the 'sum_of_digits' function with 'nums' and print the result
print(sum_of_digits(nums))

# Create a list of integers, including negative values
nums = [10, 20, -4, 5, -70]

# Print a message indicating the original list
print("\nOriginal tuple:")
print(nums)

# Print a message indicating the operation to calculate the sum of digits in the list
print("Sum of digits of each number of the said list of integers:")
# Call the 'sum_of_digits' function with 'nums' and print the result
print(sum_of_digits(nums))

Sample Output:

Original tuple: 
[10, 2, 56]
Sum of digits of each number of the said list of integers:
14

Original tuple: 
[10, 20, 4, 5, 'b', 70, 'a']
Sum of digits of each number of the said list of integers:
19

Original tuple: 
[10, 20, -4, 5, -70]
Sum of digits of each number of the said list of integers:
19

Flowchart:

For more Practice: Solve these Related Problems:

Write a Python program to compute the sum of the digits of numbers in a list, ignoring zeroes.
Write a Python program to compute the sum of the digits of numbers in a list and return the smallest sum.
Write a Python program to compute the sum of the digits of numbers in a list and count how many have an odd sum.
Write a Python program to compute the sum of the digits of numbers in a list while treating negative numbers as positive.

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