C# program to find sum of digits of a number with multiple solutions viz using method, while loop, for loop and recursion. In another word, how to add the digits of a number?
For Example ,if given input number is 789 , then the sum of digits of a given Number is 7+8+9 =24.
Examples
Given input Number is : 789
sum of digits : 24
C# program to find sum of digits of a number
Example program -1 Sum of Digits in a given Integer using While loop.
class Program
{
static void Main(string[] args)
{
int num=2489, temp, digit, sum = 0;
temp = num;
Console.WriteLine("Input Number : {0}",num);
while (num > 0)
{
digit = num % 10;
sum = sum + digit;
num /= 10;
}
Console.WriteLine("Sum of the digits of Input Number is {0}", sum);
}
}Output
Input Number : 2489
Sum of the digits of Input Number is 23
Example program -2 Sum of Digits in a given Integer using for loop in single line.
class Program
{
static void Main(string[] args)
{
int num=2489, temp, digit, sum = 0;
temp = num;
Console.WriteLine("Input Number : {0}",num);
for (sum = 0; num > 0; sum += num % 10, num /= 10) ;
Console.WriteLine("Sum of the digits of Input Number is {0}", sum);
}
}Output
Input Number : 2489
Sum of the digits of Input Number is 23
Example program -3 Sum of Digits in a given Integer using recursive function with ternary operator.
class Program
{
static void Main(string[] args)
{
int num=2489,sum;
Console.WriteLine("Input Number : {0}",num);
Program p=new Program();
sum = p.sumDigits(num);
Console.WriteLine("Sum of the digits of Input Number is {0}", sum);
}
int sumDigits(int no)
{
return no == 0 ? 0 : no % 10 + sumDigits(no / 10);
}
}Output
Input Number : 2489
Sum of the digits of Input Number is 23
Example 4-Sum of Digits in a given Integer using function.
class Program
{
public int sum;
static void Main(string[] args)
{
int num=2489,sum;
Console.WriteLine("Input Number : {0}",num);
Program p=new Program();
sum = p.sumDigits(num);
Console.WriteLine("Sum of the digits of Input Number is {0}", sum);
}
int sumDigits(int n)
{
if (n == 0)
{
return 0;
}
sum = n % 10 + sumDigits(n / 10);
return sum;
}
}Output
Input Number : 2489
Sum of the digits of Input Number is 23