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C Program to Solve Two Sum Using Brute Force (With Algorithm & Output)

 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...
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Print Even Numbers Between Two Numbers in C

Print Even Numbers Between Two Numbers in C

✅ C Program to Print Even Numbers Between Two Numbers

#include <stdio.h>

int main() {
    int start, end;

    // Input the range
    printf("Enter the starting number: ");
    scanf("%d", &start);
    printf("Enter the ending number: ");
    scanf("%d", &end);

    // Validate input
    if (start > end) {
        printf("Invalid input! Starting number must be less than or equal to ending number.\n");
        return 1;
    }

    // Print even numbers
    printf("\nEven numbers between %d and %d are:\n", start, end);
    for (int i = start; i <= end; i++) {
        if (i % 2 == 0) {
            printf("%d ", i);
        }
    }

    printf("\n");
    return 0;
}

📘 Explanation:

✅ This program takes a range (start and end) from the user.
✅ It uses a for loop to iterate between the numbers.
✅ It checks for i % 2 == 0 to print only even numbers.
✅ Invalid input is handled if start > end.
✅ The output is displayed on the same line for clarity.

🧾 Sample Output:

Enter the starting number: 10
Enter the ending number: 20

Even numbers between 10 and 20 are:
10 12 14 16 18 20

🔑 Keywords:

even numbers in C, print even range, C for loop program, beginner logic in C, range input validation

📌 Hashtags:

#CProgramming #EvenNumbers #BeginnerC #CodingPatterns #LoopLogic #ForLoopC #InterviewPrep

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