import java.io.*; class Frequency { static String n; static int l; public static void main(String args[]) throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); System.out.print("Enter a String : "); n = br.readLine(); l = n.length(); freq(); } public static void freq() { int s=0,f=-1; for(int i=0;i<l;i++) { // Find frequecy for(int j=0;j<l;j++) { if(n.charAt(i)==n.charAt(j)) s++; } // Check if the letter has occured before for(int k=0;k<i;k++) { if(n.charAt(i)==n.charAt(k)) f = 1; } // Print the letter's frequency if(f==-1) System.out.println(n.charAt(i) +" = " +s); s=0; f=-1; } } }

**ALGORITHM:-**

1. Start

2. Accept a sentence from the user.

3. Extract a character.

4. Count the no. of times it occurs in the sentence.

5. Print its frequency.

6. Repeat Steps 3 to 6 till all the frequencies are printed.

7. End

**OUTPUT:-**

Enter a String : reverberate

r = 3

e = 4

v = 1

b = 1

a = 1

t = 1

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nice logic thanks a lot for help.

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