sum of digits in java

1import java.util.Scanner;
2public class SumDigit {
3    public static void main(String[] argh){
4        System.out.println("Enter int");
5        Scanner input = new Scanner(System.in);
6        int n = input.nextInt();
7        int sum = 0 ;
8        int i = 0;
9        print( i =Sum_of_digits(sum,n));
10    }
11
12    public static int Sum_of_digits(int sum,int n){
13        if(n<=0)
14            return sum ;
15        sum += n%10;
16        return Sum_of_digits(sum,n/10);
17    }
18
19    public static void  print(int n){
20        System.out.print(n);
21    }
22}

1long number, sum;
2Scanner sc = new Scanner(System.in);
3System.out.println("Enter any DIGIT number: ");
4number = sc.nextLong();
5sc.close();
6// For Logic for adding all digits in the given number
7for (sum = 0; number != 0; number /= 10) {
8	sum += number % 10;
9	}
10System.out.println("ForLoop Sum of ALL digits: " + sum);

1import java.io.*;
2public class sd
3{
4  public static void main(String [] args)throws IOException
5  {
6     InputStreamReader hi = new InputStreamReader(System.in);
7        BufferedReader in = new BufferedReader(hi);
8        System.out.println("Enter the number");
9        int num=Integer.parseInt(in.readLine());
10    int sum=0;
11    while(num>=0)
12    {
13      int rem=n;
14      sum+=rem;
15      int quo=n/10;
16      n=quo;
17    }
18    System.out.println(sum);
19  }
20}

1//To find the sum of even digits in a given Number
2
3    public static int getEvenDigitSum(int number){
4        if(number<0){
5            return -1;
6        }
7        int finalNumber=0;
8        while(number>0){
9           if((number%10)%2==0){
10               finalNumber+=number%10;
11
12           }
13           number=number/10; //takes out last digit to test the next digit
14
15
16        }
17        return finalNumber;
18    }
19//Output: ex:number=12323 -- Ans: 4

1public class SumNatural {
2
3    public static void main(String[] args) {
4
5        int num = 100, sum = 0;
6
7        for(int i = 1; i <= num; ++i)
8        {
9            // sum = sum + i;
10            sum += i;
11        }
12
13        System.out.println("Sum = " + sum);
14    }
15}