My Java code isn't working here please check. It's working in Eclipse

#1

package lecture2;

public class ans2 {

public static void main(String[] args) {
	// TODO Auto-generated method stub

	int n = 5;
	int nsp = 2 * n - 1;

	int nr = 2 * n + 1;
	int num = n;
	int a = 0;

	for (int i = 1; i <= nr; i++) {
		if (i > n + 1)
			a = nr - i + 1;
		else
			a = i;


		for (int cst = 1; cst <= a; cst++) {
			System.out.print(num);
			num--;
		}


		for (int csp = 1; csp <= nsp; csp++) {
			System.out.print(" ");
		}


		for (int cst = 1; cst <= a; cst++) {
			num++;
			if (num != 0)
				System.out.print(num);
		}


		if (i <= (nr) / 2) {
			nsp = nsp - 2;

		} else
			nsp = nsp + 2;

		System.out.println();
	}
}

}

#2

@discobot Whenever you use Coding Blocks IDE your class name should be “Main” And there should be any package leture 2; in the code. Also you have to take input from the user don’t give hardcoded values to ‘n’ instead use scanner to scan that value from user. So corrected Code is :


public class Main {

public static void main(String[] args) {
	// TODO Auto-generated method stub

	Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
	int nsp = 2 * n - 1;

	int nr = 2 * n + 1;
	int num = n;
	int a = 0;

	for (int i = 1; i <= nr; i++) {
		if (i > n + 1)
			a = nr - i + 1;
		else
			a = i;


		for (int cst = 1; cst <= a; cst++) {
			System.out.print(num);
			num--;
		}


		for (int csp = 1; csp <= nsp; csp++) {
			System.out.print(" ");
		}


		for (int cst = 1; cst <= a; cst++) {
			num++;
			if (num != 0)
				System.out.print(num);
		}


		if (i <= (nr) / 2) {
			nsp = nsp - 2;

		} else
			nsp = nsp + 2;

		System.out.println();
	}
}
}
#3

Hi! To find out what I can do, say @discobot display help.

#4

Sir this code isn’t working too. Please help

#5

@discobot Add one more space in every Syso Statement so that your code looks the same as in sample format.(Note even a single space can cause your answer to be wrong.)
Corrected Code is below :


import java.util.*;
public class Main {

public static void main(String[] args) {
	// TODO Auto-generated method stub

	Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
	int nsp = 2 * n - 1;

	int nr = 2 * n + 1;
	int num = n;
	int a = 0;

	for (int i = 1; i <= nr; i++) {
		if (i > n + 1)
			a = nr - i + 1;
		else
			a = i;


		for (int cst = 1; cst <= a; cst++) {
			System.out.print(num+" ");
			num--;
		}


		for (int csp = 1; csp <= nsp; csp++) {
			System.out.print("  ");
		}


		for (int cst = 1; cst <= a; cst++) {
			num++;
			if (num != 0)
				System.out.print(num+" ");
		}


		if (i <= (nr) / 2) {
			nsp = nsp - 2;

		} else
			nsp = nsp + 2;

		System.out.println();
	}
}
}
#6

Hi! To find out what I can do, say @discobot display help.

#7

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