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Binary Search in C

Updated: 2026-07-05

Introduction

Binary Search in C is a complete beginner-friendly tutorial on Binary Search in C. It is designed for BTech, diploma, viva, practical exams and placement preparation.

Definition

Binary Search in C is an important concept of C programming that helps students understand programming logic, syntax, memory and problem solving.

Real Life Example

Real-life example: A C program works like a recipe. Each statement gives one clear instruction to the computer.

C Program Example

#include <stdio.h>

int main(){
    int a[]={10,20,30,40,50}, low=0, high=4, mid, key=40;
    while(low<=high){ mid=(low+high)/2; if(a[mid]==key){ printf("Found"); return 0; } else if(key<a[mid]) high=mid-1; else low=mid+1; }
    printf("Not Found"); return 0;
}

Output

Sample output will appear according to the program and input.

Viva Questions

  1. Define Binary Search in C.
  2. Give one example of Binary Search in C.
  3. What are common mistakes in Binary Search in C?

MCQs

  1. Binary Search in C belongs to which programming language? Answer: C Programming
  2. Which function is the entry point of a C program? Answer: main()