Thread: Can you help?

You can use if statement to check whether the value a is n. If it is n, then the program will terminated.

public class Card {
    static int a;
 
    public static void main(String[] args) {
        a = 1;
        System.out.println("Please enter a number: ");
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        while (a <= n) {
            System.out.print(a + " ");
            a++;
            if (a == n)
            {
                System.out.println(a);
                System.exit(1);
            }
            System.out.print(a + " ");
            a++;
            if (a == n)
            {
                System.out.println(a);
                System.exit(1);
            }
            System.out.print(a + " ");
            a++;
            if (a == n)
            {
                System.out.println(a);
                System.exit(1);
            }
            System.out.print(a + " ");
            a++;
            if (a == n)
            {
                System.out.println(a);
                System.exit(1);
            }
            System.out.println(a + "");
            a++;
        }
    }
}

Output

Please enter a number: 
12
1 2 3 4 5
6 7 8 9 10
11 12

I have a better idea

import java.util.Scanner;

public class FirstProgramme
{
public static void main(String[] args)
{

System.out.print("Please enter a number: ");
Scanner in=new Scanner(System.in);
int n=in.nextInt();
int a;
a=1;
int count;




while(a<n)
{
count=0;

while( count<= 4 )

{
System.out.print((a) + " " );
a++;
count++;

if(a==n)
{
break;
}

else if (count == 5)
{
System.out.println();
}



}
}
}
}

Please enter a number: 14
1 2 3 4 5
6 7 8 9 10
11 12 13

I think now I understand how while works
Thanks for your advices

Good job! The program works!

Some things can be done now.
- reformat the code to give clarity
- give meaningful names to variables
- put comments to explain what are you doing
- expressing the solution in a more straightforward and simple way
- etc

This kind of things are very important. I'm gonna do the first three. This is your program with very little modifications:

public class FirstProgramme {
        public static void main(String[] args) {
            // get max number to print
                System.out.print("Please enter a number: ");
                Scanner in = new Scanner(System.in);
                int maxNumber = in.nextInt();
 
            // --------------------------------------------------
            // print numbers from 1 to maxNumber
            // --------------------------------------------------
                int number = 1;
 
                // while I have numbers to print
                while ( number<maxNumber ) {
                        int count = 0;      // count for numbers printed in the line
 
                        // print next 5 numbers in the line
                        while( count <= 4 ) {
                                System.out.print(number + " " );
 
                                number++;   // next number to print
                                count++;    // now we have another number printed in the line
 
                                // if we have printed all the numbers, exit
                                if (number == maxNumber) {
                                        break;
                                // otherwise, jump to the next line every 5 numbers
                                } else if (count == 5) {
                                        System.out.println();
                                }
                        }
                }
            // --------------------------------------------------
        }
}