Day 21 : Python Program to Find Sum of Digit of a Number Without Recursion

 

def number_sum(number):

    total = 0

    number = abs(number)  

    while number > 0:

        total += number % 10 

        number //= 10         

    return total

number = int(input("Enter a number: "))

result = number_sum(number)

print(f"The sum of the digits of {number} is {result}.")

Code Explanation:

1. Function Definition

def number_sum(number):

def: Declares a new function.

number_sum: The name of the function, which computes the sum of the digits of a number.

number: Input parameter representing the number whose digits will be summed.

2. Initializing the Total

    total = 0

total: A variable to store the cumulative sum of the digits. It is initialized to 0.

3. Handling Negative Input

    number = abs(number)

abs(number): Converts the number to its absolute value, removing any negative sign.

This ensures the program works for negative numbers by treating them as positive.

4. Iterative Summation

    while number > 0:

while number > 0:: Starts a loop that runs as long as number is greater than 0.

This ensures all digits are processed.

4.1 Extracting the Last Digit

        total += number % 10

number % 10: Extracts the last digit of number.

4.2 Removing the Last Digit

        number //= 10

number //= 10: Removes the last digit of number using integer division.

5. Returning the Result

    return total

return total: Returns the sum of the digits after the loop completes.

6. Taking User Input

number = int(input("Enter a number: "))

input("Enter a number: "): Prompts the user to enter a number.

int(): Converts the input (string) into an integer.

number: Stores the user-provided number.

7. Calling the Function

result = number_sum(number)

number_sum(number): Calls the number_sum function with the user-provided number.

result: Stores the returned sum of the digits.

8. Displaying the Result

print(f"The sum of the digits of {number} is {result}.")

print(f"..."): Displays the sum of the digits in a user-friendly format using an f-string.

The original number and its sum (result) are dynamically inserted into the string.

#source code --> clcoding.com