Practical 9

Aim:- Write an interactive program to print a string entered in a pyramid form. For instance, the string “stream” has to be displayed as follows:

S

S t

S t r

S t r e

S t r e a

S t r e a m

JAVA Code :-

import java.lang.*;

import java.util.*;

class pra9

{

     public static void main(String args[])

    {

          int i,j,len,k;

         String str=new String();

         char ch[]=new char[25];

         Scanner s=new Scanner(System.in);

        System.out.print("\nEnter your string: ");

        str=s.nextLine();  

    

         len=str.length();

         ch=str.toCharArray();

         k=len;

       for(i=len;i>=0;i--)

      {

            for(j=0;j<=len;j++)

           {

                if(i < j)

               {

                    System.out.print(ch[len-k] +" ");

                    k--;

                } 

               else

                    System.out.print(" ");

         }

           System.out.println();

            k=len;

     }

  }

}

Output:-