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Program to find Frequency of each element of an array

06 May 2024

Description

Get an array as input from the user and find the frequency of each element in that array.

Input

Enter the size of array

3

Enter the elements

1 2 1

Output

1 occurs 2 times

2 occurs 1 times

 

C Program

#include<stdio.h>

int main()

{

    int n;

    int arr[n];

    printf("Enter the size of array: ");

    scanf("%d",&n);

    printf("Enter the elements of array: ");

    for(int i=0;i<n;i++)

    scanf("%d",&arr[i]);

    int visit[n];

    for(int i=0; i<n; i++){

       if(visit[i]!=1){

          int count = 1;

          for(int j=i+1; j<n; j++){

             if(arr[i]==arr[j]){

                count++;

                visit[j]=1;

             }

          }

          printf("%d occurs %d times\n", arr[i], count);

       }

   }

   return 0;

}

 

C++ Program

#include <iostream>

using namespace std;

int main()

{

    int n;

    printf("Enter the size of array: ");

    scanf("%d",&n);

    int arr[n];

    printf("Enter the array elements: ");

    for(int i=0;i<n;i++)

    scanf("%d",&arr[i]);

    int visit[n];

    for(int i=0; i<n; i++){

        if(visit[i]!=1){

           int count = 1;

           for(int j=i+1; j<n; j++){

              if(arr[i]==arr[j]){

                 count++;

                 visit[j]=1;

              }

            }

 

            cout<<arr[i]<<" occurs at "<<count<<" times "<<endl;

         }

     }

 

    return 0;

}

 

Java Program

import java.util.Arrays;

import java.util.Scanner;

class Main

{

   public static void countFrequency(int arr[], int n)

   {

         boolean visit[] = new boolean[n];

         Arrays.fill(visit, false);

         for (int i = 0; i < n; i++) {

            if (visit[i] == true)

             continue;

            int count = 1;

            for (int j = i + 1; j < n; j++) {

                if (arr[i] == arr[j]) {

                   visit[j] = true;

                   count++;

                }

            }

            System.out.println(arr[i] + " occurs " + count +" times ");

   }

  }

 

   public static void main(String []args)

   {

     int n;

    Scanner sc = new Scanner(System.in);

    System.out.println("Enter the size of the array: ");

    n = sc.nextInt();

    int[]arr = new int[n];

    System.out.println("Enter the array elements: ");

    for(int i = 0; i < n; i++)

    {

        arr[i] = sc.nextInt();

    }

      countFrequency(arr, n);

   }

}

 

Python Program

def countFrequency(arr, n):

   visit = [False for i in range(n)]

   for i in range(n):

     if (visit[i] == True):

        continue

     count = 1

     for j in range(i + 1, n, 1):

        if (arr[i] == arr[j]):

          visit[j] = True

          count += 1

     print(arr[i]," occurs ",count," times ")

n = int(input("Enter size of array: "))

arr = []

print("Enter array elements: ")

for i in range(0,n):

                temp = int(input())

                arr.append(temp)

countFrequency(arr, n)

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