//enter a no. and 0 to terminate /* sample input... 1 6 44 0 */ /****★★★ share more patterns in the coment box ★★★***/ import java.util.*; public class pattern_world { public static void main(String[] args) { int ch,i,j,k,sp,x; Scanner in = new Scanner(System.in); do { ch=in.nextInt(); System.out.println("Your choice number= "+ch); if(ch==0) { System.out.println("Program terminates"); break; } else if(ch<0) { System.out.println("enter a positive number..."); continue; } else { System.out.println("Here's your pattern\n"); switch(ch) { case 1: sp=3; for(i=1;i<=4;i++) { for(j=1;j<=sp;j++) System.out.print(" "); sp--; for(j=1;j<=i;j++) System.out.print(j+" "); for(j=i-1;j>=1;j--) System.out.print(j+" "); System.out.println(); } sp=1; for(i=3;i>=1;i--) { for(j=1;j<=sp;j++) System.out.print(" "); sp++; for(j=1;j<=i;j++) System.out.print(j+" "); for(j=i-1;j>=1;j--) System.out.print(j+" "); System.out.println(); } break; case 2: sp=0; for(i=1;i<=5;i++) { for(j=1;j<=sp;j++) System.out.print(" "); sp++; for(j=i;j<=5;j++) System.out.print("* "); System.out.println(); } sp=3; for(i=2;i<=5;i++) { for(j=1;j<=sp;j++) System.out.print(" "); sp--; for(j=1;j<=i;j++) System.out.print("* "); System.out.println(); } break; case 3: for(i=1;i<=5;i++) { for(j=1;j<=5;j++) { if(j==1||j==5||i==1||i==5) System.out.print("1 "); else System.out.print(" "); } System.out.println(); } break; case 4: for(i=1;i<=5;i++) { for(j=1;j<=i;j++) { if(j%2==1) System.out.print("* "); else System.out.print("# "); } System.out.println(); } break; case 5: x=1; sp=3; for(i=1;i<=7;i+=2) { for(j=1;j<=sp;j++) System.out.print(" "); sp--; for(j=1;j<=i;j++) { if(x<10) System.out.print(x+" "); else System.out.print(x+" "); x++; } System.out.println(); } break; case 6: x=1; for(i=5;i>=1;i--) { for(j=1;j<=i;j++) System.out.print(j+" "); System.out.println(); for(j=5;j>=x;j--) System.out.print(j+" "); x++; System.out.println(); } break; case 7: for(i=1;i<=5;i++) { for(j=i;j<=5;j++) System.out.print(j+" "); System.out.println(); } break; case 8: for(i=5;i>=1;i--) { for(j=1;j<=5;j++) { if(j>i) System.out.print(i+" "); else System.out.print(j+" "); } System.out.println(); } break; case 9: for(i=1;i<=5;i++) { for(j=1;j<=5;j++) { if(i=1;j--) { if(i=1;i--) { for(j=1;j<=5;j++) { if(i>j) System.out.print(j+" "); else System.out.print(i+" "); } for(j=5;j>=1;j--) { if(j=1;i--) { for(j=1;j<=i;j++) System.out.print(j+" "); System.out.println(); i--; for(j=i;j>=1;j--) System.out.print(j+" "); System.out.println(); } break; case 12: for(i=1;i<=5;i++) { for(j=i;j>=1;j--) System.out.print(j%2+" "); System.out.println(); } break; case 13: for(i=1;i<=5;i++) { x=1; int y=2; for(j=1;j<=i;j++) { if(i%2==1) System.out.print(x+" "); else System.out.print(y+" "); x+=2; y+=2; } System.out.println(); } break; case 14: for(i=1;i<=5;i++) { k=i; for(j=1;j<=i;j++) { System.out.print(k+" "); k=k+5-j; } System.out.println(); } break; case 15: for(i=4;i>=1;i--) { for(j=1;j<=4;j++) { if(j>i) System.out.print("* "); else System.out.print(j+" "); } for(j=4;j>=1;j--) { if(j>i) System.out.print("* "); else System.out.print(j+" "); } System.out.println(); } break; case 16:int n=5; for(i=1;i<=n;i++) { for(j=1;j<=n;j++) { if(j<=i) System.out.print("*"); else System.out.print(" "); } for(j=n;j>=0;j--) { if(i<=(j+1)) System.out.print("*"); else System.out.print(" "); } for(j=1;j<=n;j++) { if(i<=j) System.out.print("*"); else System.out.print(" "); } for(j=n;j>=1;j--) { if(j<=i) System.out.print("*"); else System.out.print(" "); } System.out.println(); } break; //**************************** newly added case 17:sp=4; for(i=1;i<=9;i+=2) { for(j=1;j<=sp;j++) System.out.print(" "+" "); for(j=1;j<=i;j++) { if(j%2==0) System.out.print(" "+" "); else System.out.print("a"+" "); } sp--; System.out.println(); } sp=1; for(i=7;i>=1;i-=2) { for(j=1;j<=sp;j++) System.out.print(" "+" "); for(j=1;j<=i;j++) { if(j%2==0) System.out.print(" "+" "); else System.out.print("a"+" "); } sp++; System.out.println(); } break; case 18:for(i=1;i<=5;i++) { for(j=i;j>=1;j--) System.out.print(j+" "); System.out.println(); } break; case 19:x=1; for(i=1;i<=5;i++) { for(j=1;j<=i;j++) { if(x<10) System.out.print(x+" "); else System.out.print(x+" "); x++; } System.out.println(); } break; case 20: sp=0; for(i=5;i>=1;i--) { for(j=1;j<=sp;j++) System.out.print(" "); for(j=i;j>=1;j--) System.out.print(j+" "); System.out.println(); i--; sp++; for(j=1;j<=sp;j++) System.out.print(" "); for(j=1;j<=i;j++) System.out.print(j+" "); System.out.println(); sp++; } break; case 21:sp=3; for(i=1;i<=7;i=i+2) { for(j=1;j<=sp;j++) System.out.print(" "); sp--; for(j=1;j<=i;j++) System.out.print(j+" "); System.out.println(); } break; case 22:for(i=5;i>=1;i--) { for(j=1;j<=i;j++) System.out.print(j+" "); for(j=1;j<=5-i;j++) System.out.print(j+" "); System.out.println(); } break; case 23:sp=5; for(i=0;i<=5;i++) { for(j=1;j<=sp;j++) System.out.print(" "); sp--; for(j=i;j>=0;j--) System.out.print(j+" "); for(j=1;j<=i;j++) System.out.print(j+" "); System.out.println(); } break; case 24: x=5; for(i=1;i<=5;i++) { for(j=x;j<=4;j++) System.out.print(j+" "); for(j=1;j<=x;j++) System.out.print("5 "); x--; System.out.println(); } break; case 25: for(i=1;i<=5;i++) { k=i; x=4; for(j=1;j<=i;j++) { System.out.print(k+" "); k+=x; x--; } System.out.println(); } break; case 26:for(i=1;i<=7;i+=2) { for(j=1;j<=i;j++) System.out.print(j+" "); System.out.println(); } break; case 27:System.out.println("\nThis is what we did in our past\n"); for(i=1;i<=10;i++) { for(j=i;j<=i+90;j+=10) System.out.print(j+" "); System.out.println(); } break; case 28:for(i=1;i<=5;i++) { for(j=5;j>=1;j--) { if(i==j) System.out.print("* "); else System.out.print(j+" "); } System.out.println(); } break; case 29:for(i=1;i<=4;i++) { for(j=1;j<=i;j++) System.out.print(j+" "); for(j=i-1;j>=1;j--) System.out.print(j+" "); System.out.println(); } break; case 30: for(i=10;i>=1;i--) { for(j=i;j<=9;j++) System.out.print(j+" "); System.out.print("0 "); for(j=9;j>=i;j--) System.out.print(j+" "); System.out.println(); } break; case 31:sp=8; for(i=1;i<=5;i++) { for(j=1;j<=i;j++) System.out.print(j+" "); for(j=1;j<=sp;j++) System.out.print(" "); sp-=2; for(j=i;j>=1;j--) System.out.print(j+" "); System.out.println(); } break; case 32:sp=4; for(i=1;i<=5;i++) { for(j=1;j<=sp;j++) System.out.print(" "); for(j=i;j>=1;j--) System.out.print(j+" "); sp--; System.out.println(); } break; case 33:for(i=1;i<=4;i++) { for(j=1;j<=i;j++) System.out.print(i+"*"); System.out.println(); } for(i=4;i>=1;i--) { for(j=1;j<=i;j++) System.out.print(i+"*"); System.out.println(); } break; case 34:sp=5; x=1; for(i=1;i<=5;i++) { for(j=1;j<=sp;j++) System.out.print(" "); sp--; for(j=1;j<=i;j++) { if(x<10) System.out.print(x+" "); else System.out.print(x+" "); x++; } System.out.println(); } break; case 35:sp=4; for(i=1;i<=5;i++) { for(j=1;j<=sp;j++) System.out.print(" "); sp--; for(j=5;j+i>=6;j--) System.out.print(j+" "); System.out.println(); } break; case 36:int y=2; x=1; for(i=1;i<=5;i++) { for(j=1;j<=i;j++) { if(j==2) y=x; System.out.print(x+" "); x++; } x=y; System.out.println(); } break; case 37:x=0; for(i=1;i<=4;i++) { for(j=i;j<=4;j++) System.out.print(j+" "); for(j=x;j>=1;j--) System.out.print(j+" "); x++; System.out.println(); } break; case 38:for(i=1;i<=5;i++) { for(j=i;j<=5;j++) System.out.print(i%2+" "); System.out.println(); } break; case 39:sp=16; x=1; for(i=1;i<=9;i+=2) { for(j=1;j<=sp;j++) System.out.print(" "); sp-=4; for(j=1;j<=i;j++) { if(x*x<10) System.out.print(x*x+" "); else if(x*x<100) System.out.print(x*x+" "); else System.out.print(x*x+" "); x++; } System.out.println(); } break; case 40: n=5; sp=n-1; for(i=0;i=1;i-=2) { for(j=1;j<=sp;j++) System.out.print(" "); sp++; for(j=1;j<=i;j++) { if(j==1||j==i) System.out.print("*"); else System.out.print(" "); } System.out.println(); } break; case 42:sp=4; char a,b; for(a='A';a<='E';a++) { for(k=1;k<=sp;k++) System.out.print(" "); sp--; for(b='A';b<=a;b++) { System.out.print(a+" "); } System.out.println(); } break; case 43:sp=4; for(i=1;i<=10;i+=2) { for(j=1;j<=sp;j++) System.out.print(" "); sp--; for(j=1;j<=i;j++) { if(j==1||j==i) System.out.print("*"); else System.out.print(" "); } System.out.println(); } sp=1; for(i=7;i>=1;i-=2) { for(j=1;j<=sp;j++) System.out.print(" "); sp++; for(j=1;j<=i;j++) { if(j==1||j==i) System.out.print("*"); else System.out.print(" "); } System.out.println(); } break; case 44:sp=4; for(i=1;i<=10;i+=2) { for(j=1;j<=sp;j++) System.out.print(" "); sp--; for(j=1;j<=i;j++) System.out.print("*"); System.out.println(); } sp=1; for(i=7;i>=1;i-=2) { for(j=1;j<=sp;j++) System.out.print(" "); sp++; for(j=1;j<=i;j++) System.out.print("*"); System.out.println(); } break; //****************** 2nd update ******************* case 45:char i1,j1,x1; for(i1='A';i1<='E';i1++) { x1=i1; for(j1='A';j1<=i1;j1++) { System.out.print(x1+" "); x1++; } System.out.println(); } break; case 46: int a1=1,b1=1;int c=a1+b1; for(i=1;i<=4;i++) { for(j=1;j<=i;j++) { System.out.print(a1+" "); a1=b1;b1=c;c=a1+b1; } System.out.println(); } break; case 47: for(i=5;i>=1;i--) { for(j=1;j<=5-i;j++) System.out.print(" "); for(j=1;j<=i;j++) System.out.print(j+" "); System.out.println(); } for(i=2;i<=5;i++) { for(j=1;j<=5-i;j++) System.out.print(" "); for(j=1;j<=i;j++) System.out.print(j+" "); System.out.println(); } break; case 48: for(i=1;i<=3;i++) { for(j=1;j<=3-i;j++) System.out.print(" "); for(j=1;j<=3;j++) System.out.print("#"+" "); System.out.println(); } break; case 49: for(i=1;i<=4;i++) { for(j=1;j<=i;j++) System.out.print(i*j+" "); System.out.println(); } break; case 50:sp=1; for(i=4;i>=1;i--) { for(j=1;j<=i;j++) System.out.print("a"); for(j=1;j<=sp;j++) System.out.print(" "); sp+=2; for(j=1;j<=i;j++) System.out.print("a"); System.out.println(); } for(i=1;i<=4;i++) { sp-=2; for(j=1;j<=i;j++) System.out.print("a"); for(j=1;j<=sp;j++) System.out.print(" "); for(j=1;j<=i;j++) System.out.print("a"); System.out.println(); } break; case 51:x=1; for(i=1;i<=4;i++) { for(j=1;j<=i;j++) { System.out.print(x+" "); x++; } y=x-2; for(j=1;j<=i-1;j++) { System.out.print(y+" "); y--; } System.out.println(); } break; case 52:sp=0; for(i1='d';i1>='a';i1--) { for(j=1;j<=sp;j++) System.out.print(" "); sp++; for(j1='a';j1<=i1;j1++) System.out.print(j1); for(j1=i1;j1>='a';j1--) System.out.print(j1); System.out.println(); } break; case 53: for(i=3;i>=1;i--) { /* 3 32 321 */ for(j=3;j>=i;j--) System.out.print(j+" "); /* 3333 22 */ for(j=1;j<=(i*2)-2;j++) System.out.print(i+" "); /* 3 23 */ for(j=i+1;j<=3;j++) System.out.print(j+" "); System.out.println(); } for(i=2;i<=3;i++) { /* 32 3 */ for(j=3;j>=i;j--) System.out.print(j+" "); /* 2 333 */ for(j=1;j<=(2*i)-3;j++) System.out.print(i+" "); /* 23 3 */ for(j=i;j<=3;j++) System.out.print(j+" " ); System.out.println(); } break; default: System.out.println("Oops! program in process , so enter till 53"); } } }while(ch!=0); } }

pattern world