C Program to Convert Decimal to Hexadecimal

August 16, 2026

Merge Sort in C++

Merge Sort in C++ Introduction Merge Sort is a popular sorting algorithm that follows the Divide and Conquer approach. It divides an array into smaller subarrays, recursively sorts those subarrays, and finally merges the sorted subarrays to produce a completely sorted array. In this tutorial, we will learn how to implement Merge Sort in C++ . The program divides the array into two halves using the mid index, recursively sorts both halves, and then combines them using the merge() function. Merge Sort has a time complexity of O(n log n) in the best, average, and worst cases. Table of Contents Algorithm C++ Program Input Sample Output Output Explanation Dry Run Flow of Execution Time Complexity Space Complexity Applications Key Points Interview Questions Frequently Asked Questions Keywords Conclusion Algorithm Start the program. Read the size of the array. Read the array elements from the user. Call the mer...

✅ C Program to Convert Decimal Number to Hexadecimal

#include <stdio.h>

int main() {
    int num;

    printf("Enter a decimal number: ");
    scanf("%d", &num);

    printf("Hexadecimal: %X\n", num);   // %X prints in uppercase A–F
    printf("Hexadecimal (lowercase): %x\n", num); // %x prints in lowercase a–f

    return 0;
}

📘 Explanation:

This program converts a decimal number into its hexadecimal representation using the printf format specifiers:

%X → prints the hexadecimal value in uppercase (A–F).
%x → prints the hexadecimal value in lowercase (a–f).
For example, decimal 255 will be displayed as FF and ff.

🧾 Sample Output:

Enter a decimal number: 255
Hexadecimal: FF
Hexadecimal (lowercase): ff

🔑 Keywords:

C program decimal to hexadecimal, printf %X and %x, decimal to hex conversion in C, hexadecimal number system C program, beginner C examples

📌 Hashtags:

#CProgramming #HexadecimalConversion #DecimalToHex #CExamples #CodingForBeginners

🔍 Search Description:

This C program converts a decimal number into hexadecimal using printf format specifiers %X and %x. It displays both uppercase and lowercase hexadecimal outputs with examples.

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