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Basic
Switch Case
Goto
Operators
if Statement
Nested if
While Loop
For Loop
Array
2D Array
Patterns
Excersises
Others



C Program to Find Whether an Element Exists in an Array


Write a C program to find whether an element exists in an array.

  • Takes input for the number of elements and stores them in an array.
  • Accepts a key value to search within the array.
  • Traverses the array using a loop to check if the key exists.
  • Prints whether the key was found or not based on the search result.
Example : pgm.c 
#include <stdio.h>

int main() {
    int n, arr[100], key, found = 0;

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

    // Input array elements
    printf("Enter %d elements:\n", n);
    for (int i = 0; i < n; i++) {
        scanf("%d", &arr[i]);
    }

    // Input element to search
    printf("Enter the element to search: ");
    scanf("%d", &key);

    // Search the element
    for (int i = 0; i < n; i++) {
        if (arr[i] == key) {
            found = 1;
            break;
        }
    }

    // Output result
    if (found)
        printf("%d exists in the array.\n", key);
    else
        printf("%d does not exist in the array.\n", key);

    return 0;
}

Output:

Enter the number of elements: 4
Enter 4 elements:
10
23
7
10
Enter the element to search: 10
10 exists in the array.