PROGRAM 11 : TO FIND THE DIGIT FREQUENCY , THAT IS THE NUMBER OF TIMES A DIGIT HAS APPEARED IN THE NUMBER.

EXAMPLE :

PROGRAM :

import java.io.*;
class Digit_Freq
{
    public static void main(String args[])throws IOException
    {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        System.out.print("Enter any number : ");
        String num = br.readLine();
        System.out.println("Output:");
        System.out.println("====================");
        System.out.println("Digit\tFrequency");
        System.out.println("====================");
       
        System.out.println();
        int count = 0;
        char ch;
        for(int i = 48 ; i<=57 ; i++) // THE ASCII VALUES OF '0' TO '9'(48 TO 57)
        {   ch = (char)i; // CONVERTS THE ASCII VALUE TO CHARACTER
            for(int j = 0 ; j<num.length() ; j++)
            {
                if(num.charAt(j)==ch) // CHECKS OCCURRENCES OF THE DIGIT IN THE WHOLE NUMBER
                    count++; // INCREASES COUNT BY '1'
            }
            if(count>0){ // DISPLAYS ONLY THE DIGITS THAT ARE IN THE NUMBER
               System.out.print(ch+ "        " + count);
               System.out.println();
            } 
               count = 0; // COUNT IS MADE ZERO SO THAT IT CHECKS THE OCCURRENCES OF NEXT DIGIT
            }
        }
    }