Description

Given an array of n positive integers, to find the elements whose
value is equal to that of its index value follow below program.

C/C++

/* C program to Find Value equal to index value */
//Save it as PrintValueEqualToIndexValue.c

#include<stdio.h>
int main(){

    int i, n;

    printf("Enter the size of array : ");
    scanf("%d",&n);

    int arr[n];

    printf("Enter the array element : ");
    for(i=0;i<n;i++) {
        scanf("%d",&arr[i]);
    }

    printf("Entered elements are : ");
    for(i=0;i<n;i++) {
        printf("%d ", arr[i]);
    }

    printf("\nValue equal to index value : ");
    for(i=0;i<n;i++) {
        if(arr[i] == (i+1)) {
            printf("%d ",arr[i]);
        }
    }
    return 0;
}

Input:
Enter the size of array : 
5
Enter the array element : 
12
2
36
6
17

Output:
Entered elements are : 
12 2 36 6 17 
Value equal to index value : 
2

Java

/* Java program to Find Value equal to index value */
//Save it as PrintValueEqualToIndexValue.java

import java.io.*;
import java.util.Scanner;

public class PrintValueEqualToIndexValue {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);
        
        System.out.println("Enter the size of array : ");
        int n = scanner.nextInt();
        
        int arr[] = new int[n];
        
        System.out.println("Enter the array element : ");
        for(int i=0;i<n;i++) {
            arr[i] = scanner.nextInt();
        }
        
        System.out.println("Entered elements are : ");
        for(int i=0;i<n;i++) {
            System.out.print(arr[i]+" ");
        }
        
        System.out.println("\nValue equal to index value : ");
        for(int i=0;i<n;i++) {
            if(arr[i] == (i+1)) {
                System.out.print(arr[i]+" ");
            }
        }
    }
}

Input:
Enter the size of array : 
5
Enter the array element : 
12
2
36
6
17

Output:
Entered elements are : 
12 2 36 6 17 
Value equal to index value : 
2

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