C Program to Search an Element in an Array (Binary search) - Source Code, Output & Execution Flow

C Program to Search an Element in an Array (Binary search)

This C program searches an element in a sorted array using binary search.

#include <stdio.h>
int main() {
    int a[] = {2, 4, 6, 8, 10, 12};
    int key = 10, low = 0, high = 5, mid, found = 0;
    while (low <= high) {
        mid = (low + high) / 2;
        if (a[mid] == key) { found = 1; break; }
        else if (a[mid] < key) low = mid + 1;
        else high = mid - 1;
    }
    if (found) printf("Element found at position %d
", mid + 1);
    else printf("Element not found
");
    return 0;
}

Element found at position 5

Practice This Program

In this program, the input is read first when required, the core logic is applied step by step, and the final result is displayed using printf(). Follow the execution flow beside the code to understand how each statement contributes to the output.