p4.java

import java.util.Scanner; 
public class p4{
	public static void main(String[] args) {
		Scanner sc=new Scanner(System.in);
		System.out.println("Enter the number");
		int n=sc.nextInt();
		 int sp = n / 2, st = 1; 
	        for (int i = 1; i <= n; i++) { 
	            for (int j = 1; j <= sp; j++) 
	                System.out.print(" "); 
	            int count = st / 2 + 1; 
	            for (int k = 1; k <= st; k++) { 
	                System.out.print(count); 
	                if (k <= st / 2) 
	                    count--; 
	                else
	                    count++; 
	            } 
	            System.out.println(); 
	            if (i <= n / 2) { 
	                sp = sp - 1; 
	                st = st + 2; 
	            } 
	            else { 
	                sp = sp + 1; 
	                st = st - 2; 
	            } 
	        } 
	    } 
	}
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