Python Program to Check If a Number is a Harshad Number

Harshad Numbers can be divided by the sum of its digits. They are also called Niven Numbers. For instance, 18 is a Harshad Number as it can be divided by 9, the sum of its digits (8+1=9). In this article, we will discuss various approaches to determine whether the given number is a Harshad Number in Python.

Example:

Input: 18
Output: 18 is a Harshad Number

Input: 15
Output: 15 is not a Harshad Number

Python Program to Check If a Number is a Harshad Number

Below are some of the approaches by which we can check if a number is a Harshad Number using Python:

• Using Loop
• Using String

Using Loop

In this example, the checkHarshad function examines whether a number is a Harshad number by verifying if the sum of its digits is divisible by the number itself. If it is, it returns "Yes"; otherwise, it returns "No".

Python3

def checkHarshad(n):
    sum = 0
    temp = n
    while temp > 0:
        sum = sum + temp % 10
        temp = temp // 10

    # Return true if sum of digits is multiple of n
    return n % sum == 0

if(checkHarshad(12)):
    print("Yes")
else:
    print("No")

if (checkHarshad(15)):
    print("Yes")
else:
    print("No")

Output

Yes
No

Using String

In this example, we are using str() function to check if a number is a Harshad Number or not.

Python3

def checkHarshad(n):
    # Converting integer to string
    st = str(n)
    sum = 0
    length = len(st)

    for i in st:
        sum = sum + int(i)

    # Comparing number and sum
    if (n % sum == 0):
        return "Yes"
    else:
        return "No"

number = 18
print(checkHarshad(number))

number = 15
print(checkHarshad(number))

Output

Yes
No