How to get the Index of Specified Element in an Array in C

How to get the Index of Specified Element in an Array in C ?

Answer

To get the index of a specified element in an array in C, you can iterate through the array and compare each element with the specified element.


✐ Examples

1 Index of Element 30 in Integer Array

In this example,

  1. We create an integer array arr with values 10, 20, 30, 40, 50.
  2. We iterate through the array and compare each element with the specified element 30.
  3. If the element is found, we print its index.
  4. If the element is not found, we print a message indicating it's not in the array.

C Program

#include <stdio.h>

int main() {
    int arr[] = {10, 20, 30, 40, 50};
    int specifiedElement = 30;
    int size = sizeof(arr) / sizeof(arr[0]);
    int index = -1;

    for (int i = 0; i < size; i++) {
        if (arr[i] == specifiedElement) {
            index = i;
            break;
        }
    }

    if (index != -1) {
        printf("Index of specified element %d is: %d\n", specifiedElement, index);
    } else {
        printf("Specified element not found in the array\n");
    }

    return 0;
}

Output

Index of specified element 30 is: 2

2 Index of Element 60 in Integer Array

In this example,

  1. We create an integer array arr with values 10, 20, 30, 40, 50.
  2. We iterate through the array and compare each element with the specified element 60.
  3. If the element is found, we print its index.
  4. If the element is not found, we print a message indicating it's not in the array.

C Program

#include <stdio.h>

int main() {
    int arr[] = {10, 20, 30, 40, 50};
    int specifiedElement = 60;
    int size = sizeof(arr) / sizeof(arr[0]);
    int index = -1;

    for (int i = 0; i < size; i++) {
        if (arr[i] == specifiedElement) {
            index = i;
            break;
        }
    }

    if (index != -1) {
        printf("Index of specified element %d is: %d\n", specifiedElement, index);
    } else {
        printf("Specified element not found in the array\n");
    }

    return 0;
}

Output

Specified element not found in the array

Summary

In this tutorial, we learned How to get the Index of Specified Element in an Array in C language with well detailed examples.


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