package challanges;
import java.util.Scanner;
public class patternhourglass {
public static void main(String[] args) {
Scanner scn= new Scanner(System.in);
int n=scn.nextInt();
int nsp=0;
int nst=2*n+1;
int val;
int row=0;
while(row<(2*n+1)) {
val=n;
for(int csp=1;csp<=nsp;csp++) {
System.out.print(" ");
}
for(int cst=1;cst<=nst;cst++) {
System.out.print(val);
if (cst<=(nst/2)) {
val--;
}
else {
val++;
}
}
for(int csp=1;csp<=nsp;csp++) {
System.out.print(" ");
}
System.out.println();
row++;
if(row<=((2*n+1)/2)) {
nst=nst-2;
nsp=nsp+1;
}
else {
nst=nst+2;
nsp=nsp-1;
}
}
}
}
what is wrong in this code ???