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C Program to Check Prime Number Using Efficient Logic

  Introduction A prime number is a number that has exactly two distinct positive divisors: 1 and itself. In this program, we check whether a given number is prime or not using a simple and efficient logic. This type of program is commonly used in mathematics, competitive programming, and basic algorithm learning for beginners in C programming. Problem Statement The task is to write a C program that determines whether a given integer is a prime number or not. The program takes a single integer input from the user and analyzes its divisibility. If the number has no divisors other than 1 and itself, it should be identified as a prime number; otherwise, it is not prime. This problem is important in number theory and has practical relevance in areas such as cryptography, data validation, and algorithm design.  Algorithm / Logic Explanation To check whether a number is prime, we need to verify that it is not divisible by any number other than 1 and itself. The algorithm follows a si...
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Find Smallest of Three Numbers in C

Find Smallest of Three Numbers in C

✅ Find the Smallest of Three Numbers in C

#include<stdio.h>

int main() {
    int a, b, c;
    printf("Enter any three numbers:\n");
    scanf("%d %d %d", &a, &b, &c);

    if (a <= b && a <= c) {
        printf("Smallest number among three is: %d\n", a);
    }
    else if (b <= a && b <= c) {
        printf("Smallest number among three is: %d\n", b);
    }
    else {
        printf("Smallest number among three is: %d\n", c);
    }

    return 0;
}

📘 Explanation:

This C program helps you find the smallest number out of three inputs using conditional logic. It compares:

  • First if a is smaller than or equal to both b and c.
  • If not, it checks if b is the smallest.
  • If both conditions fail, c is the smallest.
This method is efficient and handles equal numbers as well.

🧾 Sample Output:

Enter any three numbers:
12 9 27
Smallest number among three is: 9

🔑 Keywords:

Smallest of three numbers, if else in C, compare numbers in C, minimum value logic, basic C programs, beginner C examples

📌 Hashtags:

#CProgramming #SmallestNumber #IfElseC #MinOfThree #BeginnerC #LogicInC

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