/*enter... 1--->pattern#1 2--->pattern#2 3--->pattern#3 4--->pattern#4 5--->pattern#5 ...in addition to this enter the number of rows for patterns 1,2 and 3 For example.. Input:2 3 Output: 1 3 2 6 5 4 For patterns 4 and 5,2n+1 rows of output is displayed where n is the second input For example.. Input: 5 2 Output: # # # # # # # # # # # # # # # # */ import java.util.Scanner; public class Program { public static void main(String[] args) { Scanner s=new Scanner(System.in); int choice=s.nextInt(); int n=s.nextInt(); switch(choice) { case 1: { int t=1; for(int i=1;i<=n;i++) { for(int j=1;j<=i;j++) { System.out.print(t*t+" "); t++; } System.out.println(); } break; } case 2: { int k=0; for(int i=1;i<=n;i++) { k=k+i; int m=k; for(int j=1;j<=i;j++) { System.out.print(m+" "); m--; } System.out.println(); } break; } case 3: { String str="ABCDEFGHIJKLMNOPQRSTUVWXYZ"; char c[]=str.toCharArray(); int l=0; for(int i=2;i<=2*n;i+=2) { for(int j=1;j<=i;j++) { if(l>25) l=0; System.out.print(c[l]+" "); l++; } System.out.println(); } break; } case 4: { for(int i=n;i<=2*n;i++) { for(int j=1;j<=i;j++) { System.out.print("# "); } System.out.println(); } for(int i=2*n-1;i>=n;i--) { for(int j=1;j<=i;j++) { System.out.print("# "); } System.out.println(); } break; } case 5: { for(int i=2*n;i>=n;i--) { for(int j=1;j<=i;j++) { System.out.print("# "); } System.out.println(); } for(int i=n+1;i<=2*n;i++) { for(int j=1;j<=i;j++) { System.out.print("# "); } System.out.println(); } break; } default: System.out.println("WRONG CHOICE!!!"); } } }

pattern*2*

pattern2