Question

Write a program to accept a string .Convert it to upper case and count the number of double letter sequence in that string

Answer 1

Answer:

import java.util.Scanner;

class CountDouble

{

public static void main(String arg[])

{

 Scanner input = new Scanner(System.in);

 int i,c=0,l;

 System.out.println("Enter a string:");

 String str = input.nextLine();

 String str1 = str.toUpperCase();

 l = str.length();

 char ch1,ch2;  

 for(i=0;i<l-1;i++)

 {

  ch1 = str1.charAt(i);

  ch2 = str1.charAt(i+1);

  if(ch1==ch2)

  c++;

 }

 System.out.println("Total number of double numbers: " +c);

}

Explanation:

Hope it is useful!