### C# Basic

### C# Interview Programs

- C# Interview Programs
- C# Abundant Number
- C# Amicable Number
- C# Armstrong Number
- C# Average of N Numbers
- C# Automorphic Number
- C# Biggest of three numbers
- C# Binary to Decimal
- C# Common Divisors
- C# Composite Number
- C# Condense a Number
- C# Cube Number
- C# Decimal to Binary
- C# Decimal to Octal
- C# Disarium Number
- C# Even Number
- C# Evil Number
- C# Factorial of a Number
- C# Fibonacci Series
- C# GCD
- C# Happy Number
- C# Harshad Number
- C# LCM
- C# Leap Year
- C# Magic Number
- C# Matrix Addition
- C# Matrix Division
- C# Matrix Multiplication
- C# Matrix Subtraction
- C# Matrix Transpose
- C# Maximum Value of an Array
- C# Minimum Value of an Array
- C# Multiplication Table
- C# Natural Number
- C# Number Combination
- C# Odd Number
- C# Palindrome Number
- C# Pascalβs Triangle
- C# Perfect Number
- C# Perfect Square
- C# Power of 2
- C# Power of 3
- C# Pronic Number
- C# Prime Factor
- C# Prime Number
- C# Smith Number
- C# Strong Number
- C# Sum of Array
- C# Sum of Digits
- C# Swap Two Numbers
- C# Triangular Number

# C# Program to Check Harshad Number

Photo Credit to CodeToFun

## π Introduction

In the realm of programming, a Harshad number (or Niven number) is a positive integer that is divisible by the sum of its digits. Checking for Harshad numbers involves finding the sum of the digits and determining if the original number is divisible by this sum.

In this tutorial, we will explore a C# program designed to check whether a given number is a Harshad number.

## π Example

Let's delve into the C# code that accomplishes this task.

```
using System;
class Program {
// Function to check if a number is a Harshad number
static bool IsHarshadNumber(int number) {
int originalNumber = number;
int sumOfDigits = 0;
// Calculate the sum of digits
while (number > 0) {
sumOfDigits += number % 10;
number /= 10;
}
// If the original number is divisible by the sum of digits, it is a Harshad number
return (originalNumber % sumOfDigits == 0);
}
// Main method
static void Main() {
// Replace this value with the number you want to check
int number = 18;
// Call the function to check if the number is a Harshad number
if (IsHarshadNumber(number)) {
Console.WriteLine($"{number} is a Harshad number.");
} else {
Console.WriteLine($"{number} is not a Harshad number.");
}
}
}
```

### π» Testing the Program

To test the program with different numbers, modify the value of number in the Main method.

18 is a Harshad number.

### π§ How the Program Works

- The program defines a static method IsHarshadNumber that takes an integer number as input and returns true if the number is a Harshad number, and false otherwise.
- Inside the method, it calculates the sum of the digits by iterating through the digits of the number.
- If the original number is divisible by the sum of digits, the method returns true, indicating a Harshad number.
- Inside the Main method, replace the value of number with the desired number you want to check.
- The program calls the IsHarshadNumber method and prints the result.

## π Between the Given Range

Let's delve into the C# code that checks for Harshad numbers in the specified range.

```
using System;
class Program {
// Function to check if a number is a Harshad number
static bool IsHarshad(int number) {
int sumOfDigits = 0;
int originalNumber = number;
// Calculate the sum of digits
while (number > 0) {
sumOfDigits += number % 10;
number /= 10;
}
// Check if the original number is divisible by the sum of digits
return (originalNumber % sumOfDigits == 0);
}
// Driver program
static void Main() {
Console.Write("Harshad numbers in the range 1 to 20: \n");
for (int i = 1; i <= 20; i++) {
if (IsHarshad(i)) {
Console.Write(i + " ");
}
}
Console.WriteLine();
}
}
```

### π» Testing the Program

Harshad numbers in the range 1 to 20: 1 2 3 4 5 6 7 8 9 10 12 18 20

Compile and run the program to see the Harshad numbers in the range from 1 to 20.

### π§ How the Program Works

- The program defines a function IsHarshad that checks if a given number is a Harshad number.
- Inside the function, it calculates the sum of the digits of the number.
- The main function iterates through numbers from 1 to 20 and prints those that are Harshad numbers.

## π§ Understanding the Concept of Harshad Number

Before delving into the code, let's understand the concept of Harshad numbers. A Harshad number is a positive integer that is divisible by the sum of its digits.

## π’ Optimizing the Program

While the provided program is effective, consider exploring and implementing alternative approaches or optimizations for checking Harshad numbers.

While the provided program is effective, consider exploring and implementing alternative approaches or optimizations for checking Harshad numbers.

## π¨βπ» Join our Community:

## Author

For over eight years, I worked as a full-stack web developer. Now, I have chosen my profession as a full-time blogger at codetofun.com.

Buy me a coffee to make codetofun.com free for everyone.

Buy me a Coffee
If you have any doubts regarding this article (

C# Program to Check Harshad Number), please comment here. I will help you immediately.