How to print out each three number (for Even number and Odd number)?

Question

I want print output First Three Even number, After First Three odd number, After Second Three Even number After Second Three odd number

{ Like 
Even Number 
0 
2 
4  
Odd Number 
1 
3 
5
Even Number 
6 
8 
10
Odd Number 
7 
9 
11 }

Code:

public class OddAndEven {

/**
 * @param args
 */
public static void main(String[] args) {
    // TODO Auto-generated method stub
    int i;
    for(i=0;i<=50;i++){
        if(i%2==1){
            System.out.print("Odd Number "+i);
        }
        if(i%2==0){
            System.out.print("     ");
            System.out.println("Even Number "+i);
        }
    }

}

}

Answer 1

A simple way

    for(i=0;i<=50;i = i + 6){
        System.out.println("Even Number");
        logIt (i);
        logIt (i + 2);
        logIt (i + 4);

        System.out.println("Odd Number");
        logIt (i + 1);
        logIt (i + 3);
        logIt (i + 5);

    }

private void logIt (int i) {
   if (i <= 50) System.out.println(i);
}

Answer 2

Try this :-

public static void main(String str[]){



        final int step = 3;

        for (int s = 0; s < 50; s += step * 2) {

            System.out.println("Even number");
            for (int i = 0; i < step; i++) {
                int val=(s + i * 2);
                if(val<=50)
                System.out.println(val);
            }


            System.out.println("Odd number");
            for (int i = 0; i < step; i++) {
                int val=(s + i * 2 + 1);
                if(val<=50)
                System.out.println(val);
            }
        }
 }

Output :

Even number
0
2
4
Odd number
1
3
5
Even number
6
8
10
Odd number
7
9
11
Even number
12
14
16
Odd number
13
15
17
Even number
18
20
22
Odd number
19
21
23
Even number
24
26
28
Odd number
25
27
29
Even number
30
32
34
Odd number
31
33
35
Even number
36
38
40
Odd number
37
39
41
Even number
42
44
46
Odd number
43
45
47
Even number
48
50
Odd number
49

Hope it will help you.

Answer 3

Hope you like this clean version:

public static void main(String[] args) throws Exception {
    for (int value = 4; value <= 50; value += 4) {
        print(value++, "Even");
        print(value++, "Odd");
    }
}

private static void print(int value, String prefix) {
    System.out.println(prefix + " number");
    for (int diff = 4; diff >= 0; diff -= 2) System.out.println(value - diff);
}

Answer 4

Another solution with a producer:

public static void main (String[] args) {

    OddEvenSequenceProducer producer = new OddEvenSequenceProducer();
    for (int i = 0; i < 50; i++) {
        System.out.println(producer.next());
    }
}

private static class OddEvenSequenceProducer {

    private final int step = 3;
    private int run;
    private int i;
    private boolean odd;

    public int next () {

        int value = (run * step + i++) * 2 + (odd ? 1 : 0);
        if (i == step) {
            i = 0;
            if (odd)
                run++;
            odd = !odd;
        }
        return value;
    }
}

Answer 5

public class TrazenjeBrojeva 
{
public static void main(String args[])
{
    int j=0, k=1;
    for(;k<50;)
    {
        for(int firstLoop=0;firstLoop<3;firstLoop++)
        {
            if((j%2)==0)
            {
                if(j>50)
                {
                    break;
                }
                System.out.println("Number is even: "+j);
                j+=2;

            }
        }

        for(int secondLoop=0;secondLoop<3;secondLoop++)
        {
            if(!((k%2)==0))
            {
                if(k>50)
                {
                    break;
                }
                System.out.println("Number is odd: "+k);
                k+=2;

            }
        }

    }
}
}

Only with if and for loops, it works

Answer 6

Solution:

final int step = 3;

for (int s = 0; s < 50; s += step * 2) {

    System.out.println("Even number");
    for (int i = 0; i < step; i++) {
        System.out.println(s + i * 2);
    }
    System.out.println("Odd number");
    for (int i = 0; i < step; i++) {
        System.out.println(s + i * 2 + 1);
    }
}