Write a program to display the following alphabetical series.

Question-:

class Patterns { void main(char ch) { char i,j,x='A',c; switch (ch) { case 'a': //to print the first(a) pattern for(i='A';i<='E';i++) { for(j=i;j<='E';j++) { System.out.print(j); } System.out.println(); } break; case 'b': //to print the second(b) pattern for(i='A';i<='E';i++) { for(j='A';j<=i;j++) { System.out.print(x); ++x; } System.out.println(); } break; case 'c': //to print the third(c) pattern for(i='E';i>='A';i--) { c='A'; for(j='A';j<='E';j++) { if(i>=j) System.out.print(j); else { System.out.print(c); c++; } } System.out.println(); } break; default: System.out.println("INVALID CHOICE"); } } }

Outputs-:

(a)  ABCDE

      BCDE

      CDE

      DE

      E

(b)   A

       BC

       DEF

       GHIJ

       KLMNO

(c)  ABCDE

      ABCDA

      ABCAB

      ABABC

      AABCD

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