Program to Convert Hexadecimal Number to Binary

Given a Hexadecimal number as an input, the task is to convert that number to Binary number.

Examples:

Input: Hexadecimal = 1AC5
Output: Binary = 0001101011000101
Explanation:
    Equivalent binary value of 1: 0001
    Equivalent binary value of A: 1010
    Equivalent binary value of C: 1100
    Equivalent binary value of 5: 0101

Input: Hexadecimal = 5D1F
Output: Binary = 0101110100011111


Approach: A hexadecimal number is a positional numeral system with a radix, or base, of 16 and uses sixteen distinct symbols.

A binary number is a number expressed in the base-2 binary numeral system, which uses only two symbols: which are 0 (zero) and 1 (one).

To convert HexaDecimal number to Binary, the binary equivalent of each digit of the HexaDecimal number is evaluated and combined at the end to get the equivalent binary number.

Below is the implementation of the above approach:

C++

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// C++ program to convert
// Hexadecimal number to Binary
  
#include <bits/stdc++.h>
using namespace std;
  
// function to convert
// Hexadecimal to Binary Number
void HexToBin(string hexdec)
{
    long int i = 0;
  
    while (hexdec[i]) {
  
        switch (hexdec[i]) {
        case '0':
            cout << "0000";
            break;
        case '1':
            cout << "0001";
            break;
        case '2':
            cout << "0010";
            break;
        case '3':
            cout << "0011";
            break;
        case '4':
            cout << "0100";
            break;
        case '5':
            cout << "0101";
            break;
        case '6':
            cout << "0110";
            break;
        case '7':
            cout << "0111";
            break;
        case '8':
            cout << "1000";
            break;
        case '9':
            cout << "1001";
            break;
        case 'A':
        case 'a':
            cout << "1010";
            break;
        case 'B':
        case 'b':
            cout << "1011";
            break;
        case 'C':
        case 'c':
            cout << "1100";
            break;
        case 'D':
        case 'd':
            cout << "1101";
            break;
        case 'E':
        case 'e':
            cout << "1110";
            break;
        case 'F':
        case 'f':
            cout << "1111";
            break;
        default:
            cout << "\nInvalid hexadecimal digit "
                 << hexdec[i];
        }
        i++;
    }
}
  
// driver code
int main()
{
  
    // Get the Hexadecimal number
    char hexdec[100] = "1AC5";
  
    // Convert HexaDecimal to Binary
    cout << "\nEquivalent Binary value is : ";
    HexToBin(hexdec);
  
    return 0;
}

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C

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// C program to convert
// Hexadecimal number to Binary
  
#include <stdio.h>
  
// function to convert Hexadecimal to Binary Number
void HexToBin(char* hexdec)
{
  
    long int i = 0;
  
    while (hexdec[i]) {
  
        switch (hexdec[i]) {
        case '0':
            printf("0000");
            break;
        case '1':
            printf("0001");
            break;
        case '2':
            printf("0010");
            break;
        case '3':
            printf("0011");
            break;
        case '4':
            printf("0100");
            break;
        case '5':
            printf("0101");
            break;
        case '6':
            printf("0110");
            break;
        case '7':
            printf("0111");
            break;
        case '8':
            printf("1000");
            break;
        case '9':
            printf("1001");
            break;
        case 'A':
        case 'a':
            printf("1010");
            break;
        case 'B':
        case 'b':
            printf("1011");
            break;
        case 'C':
        case 'c':
            printf("1100");
            break;
        case 'D':
        case 'd':
            printf("1101");
            break;
        case 'E':
        case 'e':
            printf("1110");
            break;
        case 'F':
        case 'f':
            printf("1111");
            break;
        default:
            printf("\nInvalid hexadecimal digit %c",
                   hexdec[i]);
        }
        i++;
    }
}
  
// driver code
int main()
{
  
    // Get the Hexadecimal number
    char hexdec[100] = "1AC5";
  
    // Convert HexaDecimal to Binary
    printf("\nEquivalent Binary value is : ");
    HexToBin(hexdec);
}

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Java

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// Java program to convert
// Hexadecimal number to Binary
  
public class Improve {
  
    // function to convert
    // Hexadecimal to Binary Number
    static void HexToBin(char hexdec[])
    {
        int i = 0;
  
        while (hexdec[i] != '\u0000') {
  
            switch (hexdec[i]) {
            case '0':
                System.out.print("0000");
                break;
            case '1':
                System.out.print("0001");
                break;
            case '2':
                System.out.print("0010");
                break;
            case '3':
                System.out.print("0011");
                break;
            case '4':
                System.out.print("0100");
                break;
            case '5':
                System.out.print("0101");
                break;
            case '6':
                System.out.print("0110");
                break;
            case '7':
                System.out.print("0111");
                break;
            case '8':
                System.out.print("1000");
                break;
            case '9':
                System.out.print("1001");
                break;
            case 'A':
            case 'a':
                System.out.print("1010");
                break;
            case 'B':
            case 'b':
                System.out.print("1011");
                break;
            case 'C':
            case 'c':
                System.out.print("1100");
                break;
            case 'D':
            case 'd':
                System.out.print("1101");
                break;
            case 'E':
            case 'e':
                System.out.print("1110");
                break;
            case 'F':
            case 'f':
                System.out.print("1111");
                break;
            default:
                System.out.print("\nInvalid hexadecimal digit " + hexdec[i]);
            }
            i++;
        }
    }
  
    // Driver code
    public static void main(String args[])
    {
        // Get the Hexadecimal number
        String s = "1AC5" ;
        char hexdec[] = new char[100] ;
            hexdec = s.toCharArray() ;
  
        // Convert HexaDecimal to Binary
        System.out.print("\nEquivalent Binary value is : ");
        try{
            HexToBin(hexdec);
        }
        catch (ArrayIndexOutOfBoundsException e){
            System.out.print("");
        }
  
    }
    // This code is contributed by ANKITRAI1
}
  

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C#

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// C# program to convert Hexadecimal 
// number to Binary
  
class GFG 
{
  
// function to convert
// Hexadecimal to Binary Number
static void HexToBin(char[] hexdec)
{
int i = 0;
  
while (hexdec[i] != '\u0000'
{
  
    switch (hexdec[i]) 
    {
    case '0':
        System.Console.Write("0000");
        break;
    case '1':
        System.Console.Write("0001");
        break;
    case '2':
        System.Console.Write("0010");
        break;
    case '3':
        System.Console.Write("0011");
        break;
    case '4':
        System.Console.Write("0100");
        break;
    case '5':
        System.Console.Write("0101");
        break;
    case '6':
        System.Console.Write("0110");
        break;
    case '7':
        System.Console.Write("0111");
        break;
    case '8':
        System.Console.Write("1000");
        break;
    case '9':
        System.Console.Write("1001");
        break;
    case 'A':
    case 'a':
        System.Console.Write("1010");
        break;
    case 'B':
    case 'b':
        System.Console.Write("1011");
        break;
    case 'C':
    case 'c':
        System.Console.Write("1100");
        break;
    case 'D':
    case 'd':
        System.Console.Write("1101");
        break;
    case 'E':
    case 'e':
        System.Console.Write("1110");
        break;
    case 'F':
    case 'f':
        System.Console.Write("1111");
        break;
    default:
        System.Console.Write("\nInvalid hexadecimal digit "
                                                  hexdec[i]);
        break;
    }
    i++;
}
}
  
// Driver code
static void Main()
{
    // Get the Hexadecimal number
    string s = "1AC5" ;
    char[] hexdec = new char[100];
           hexdec = s.ToCharArray();
  
    // Convert HexaDecimal to Binary
    System.Console.Write("Equivalent Binary value is : ");
    try
    {
        HexToBin(hexdec);
    }
    catch (System.IndexOutOfRangeException)
    {
        System.Console.Write("");
    }
}
}
  
// This code is contributed by mits

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PHP

Output:

Equivalent Binary value is : 0001101011000101


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