Sum of Digits

Loops · Intermediate · 55 XP · about 5 min

Write a function called sum_of_digits(n) that returns the sum of all digits in a non-negative integer.

Example

sum_of_digits(123)    # Returns 6 (1 + 2 + 3)
sum_of_digits(9999)   # Returns 36 (9 + 9 + 9 + 9)
sum_of_digits(0)      # Returns 0
sum_of_digits(7)      # Returns 7

Requirements

Handle single-digit numbers
Handle zero
You can assume n is non-negative

def sum_of_digits(n):

# Your code here

pass

# Test your function

print(sum_of_digits(123))

print(sum_of_digits(9999))

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