Question

a. Write a function sumDigits that takes a positive integer value and returns the
total sum of the digits in the integers from 1 to that number inclusive.
b. Write a program to input an integer n and call the above function in part a if n
is positive, else give ‘Value must be Positive’ message.
Sample Runs:
Enter a positive integer: 1000000
The sum of the digits in the number from 1 to 1000000 is 27000001
Enter a positive integer: -642
Value must be Positive

and write e a docstring comment for this

Answer 1

The python program validates the input and print error when the value is not positive. When the value is positive, it will find the sum of the from 1 to N and print the output.

def sumDigits(num):
    """This method will find the sum of numbers from 1 to num."""
    sum=0;
    # Calculate the sum of number and save to the sum variable
    for x in range(1, num +1):
        sum+=x
    print("The sum of the digits in the number from 1 to ", num,  " is : ", sum)

print(sumDigits.__doc__)
num = int(input("Enter a positive integer :"));
# Print the error message if the number is not positive.
if num < 0:
    print("Value must be Positive");
else:
    sumDigits(num);

Output