C Program to Check Leap Year

February 24, 2026

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Introduction The Two Sum problem is a popular coding interview question where we must find two indices of an array whose values add up to a given target. This program demonstrates a simple brute-force solution in C using nested loops and dynamic memory allocation. Problem Statement Given an integer array and a target value, return the indices of the two numbers such that they add up to the target. Each input has exactly one solution, and the same element cannot be used twice. The result should return the indices, not the values. If no solution exists, return NULL. Algorithm / Logic Explanation Start the program. Traverse the array using a loop from index 0 to numsSize - 1 . Inside this loop, use another loop starting from i + 1 to numsSize - 1 . For every pair (i, j) , check if nums[i] + nums[j] == target . If condition becomes true: Allocate memory for 2 integers using malloc() . Store indices i and j . Set returnSize = 2 . Return the result poi...

✅ C Program to Check Leap Year


#include <stdio.h>

int main()
{
    int year;

    printf("Enter a year: ");
    scanf("%d", &year);

    if ((year % 400 == 0) || (year % 4 == 0 && year % 100 != 0))
        printf("%d is a Leap Year\n", year);
    else
        printf("%d is NOT a Leap Year\n", year);

    return 0;
}

📘 Explanation:

This C program checks whether a given year is a leap year or not.

A year is a leap year if:

It is divisible by 400, OR
It is divisible by 4 but not divisible by 100

These conditions are checked using logical operators and modulus (%) operator.

🧾 Sample Output:

Enter a year:
2024
2024 is a Leap Year

🔑 Keywords:

C leap year program, leap year logic in C, C conditional statements, C if else program, year checking in C

🔍 Search Description:

Learn how to check whether a given year is a leap year in C programming with simple logic, explanation, and output.

📌 Hashtags:

#CProgramming #LeapYear #CPrograms #ProgrammingBasics #1printf

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