Question

Write a program to input a string and convert into uppercase and count double letters present in it.

Eg : rabbit eats carrots

Output : 2

Answer 1

$\huge \bold{CODING}$

import java. io.*;

class double

{

public static void main(String args[])throws Exception

{

DataInputStream in=new DataInputStream(System . in);

{

int i, j,ctr= 0;

String s;

char ch, c;

System . out. println("Enter any string");

s= in . readLine();

s=to. UpperCase();

for(i=0;i<s . length();i++)

{

ch=s . charAt(i);

for(j=(i+1);j<s . length();j++)

{

c=s . charAt(j);

if(ch==c)

ctr++;

}

}

System . out. println("Number of doubled words are"+ctr);

}

}

$\huge \bold{OUT PUT}$

s=I like apple.

ctr will be =1

So,

$\underline \bold{Number \: of \: doubled \:words \: are \:1.}$

Answer 2

Answer:

import java.util.Scanner;

public class LetterSeq

{

public static void main(String args[]) {

Scanner in = new Scanner(System.in);

System.out.print("Enter string: ");

String s = in.nextLine();

String str = s.toUpperCase();

int count = 0;

int len = str.length();

for (int i = 0; i < len - 1; i++) {

if (str.charAt(i) == str.charAt(i + 1))

count++;

}

System.out.println("Double Letter Sequence Count = " + count);

}

}

Explanation:

input = rabbit eats carrots

output = 2