Program to Convert Hexadecimal Number to Binary

05 Jul, 2022
Given a Hexadecimal number as an input, the task is to convert that number to a 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++
C
Java
Python3
C#
PHP
Javascript
// C++ program to convert// Hexadecimal number to Binary #include <bits/stdc++.h>using namespace std; // function to convert// Hexadecimal to Binary Numbervoid 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 codeint main(){     // Get the Hexadecimal number    char hexdec[100] = "1AC5";     // Convert HexaDecimal to Binary    cout << "\nEquivalent Binary value is : ";    HexToBin(hexdec);     return 0;}
// C program to convert// Hexadecimal number to Binary #include <stdio.h> // function to convert Hexadecimal to Binary Numbervoid 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 codeint main(){     // Get the Hexadecimal number    char hexdec[100] = "1AC5";     // Convert HexaDecimal to Binary    printf("\nEquivalent Binary value is : ");    HexToBin(hexdec);}
// 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}
# Python3 program to convert# Hexadecimal number to Binary # Function to convert# Hexadecimal to Binary Numberdef HexToBin(hexdec):      for i in hexdec:               if i == '0':            print('0000', end = '')        elif i == '1':            print('0001', end = '')        elif i == '2':            print('0010', end = '')        elif i == '3':            print('0011', end = '')        elif i == '4':            print('0100', end = '')        elif i == '5':            print('0101', end = '')        elif i == '6':            print('0110', end = '')        elif i == '7':            print('0111', end = '')        elif i == '8':            print('1000', end = '')        elif i == '9':            print('1001', end = '')        elif i == 'A' or i == 'a':            print('1010', end = '')        elif i == 'B' or i == 'b':            print('1011', end = '')        elif i == 'C' or i == 'c':            print('1100', end = '')        elif i == 'D' or i == 'd':            print('1101', end = '')        elif i == 'E' or i == 'e':            print('1110', end = '')        elif i == 'F' or i == 'f':            print('1111', end = '')        else:            print("\nInvalid hexadecimal digit " +                    str(hexdec[i]), end = '')             # Driver codeif __name__=="__main__":         # Get the Hexadecimal number    hexdec= "1AC5";      # Convert HexaDecimal to Binary    print("Equivalent Binary value is : ",           end = '')    HexToBin(hexdec)     # This code is contributed by Rutvik_56
// C# program to convert Hexadecimal// number to Binary class GFG{ // function to convert// Hexadecimal to Binary Numberstatic 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 codestatic 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
<?php// PHP program to convert// Hexadecimal number to Binary // function to convert// Hexadecimal to Binary Numberfunction HexToBin($hexdec){    $i = 0;         while ($hexdec[$i])    {        switch ($hexdec[$i])        {        case '0':            echo "0000";            break;        case '1':            echo "0001";            break;        case '2':            echo "0010";            break;        case '3':            echo "0011";            break;        case '4':            echo "0100";            break;        case '5':            echo "0101";            break;        case '6':            echo "0110";            break;        case '7':            echo "0111";            break;        case '8':            echo "1000";            break;        case '9':            echo "1001";            break;        case 'A':        case 'a':            echo "1010";            break;        case 'B':        case 'b':            echo "1011";            break;        case 'C':        case 'c':            echo "1100";            break;        case 'D':        case 'd':            echo "1101";            break;        case 'E':        case 'e':            echo "1110";            break;        case 'F':        case 'f':            echo "1111";            break;        default:            echo "\nInvalid hexadecimal digit ".                                    $hexdec[$i];        }        $i++;    }} // Driver Code // Get the Hexadecimal number$hexdec = "1AC5"; // Convert HexaDecimal to Binaryecho "\nEquivalent Binary value is : ";HexToBin($hexdec); // This code is contributed// by Akanksha Rai
<script>// JavaScript program to convert// Hexadecimal number to Binary // function to convert// Hexadecimal to Binary Numberfunction HexToBin(hexdec){    var i = 0;     while (hexdec[i]) {         switch (hexdec[i]) {        case '0':            document.write("0000");            break;        case '1':            document.write("0001");            break;        case '2':            document.write("0010");            break;        case '3':            document.write("0011");            break;        case '4':           document.write("0100");            break;        case '5':            document.write("0101");            break;        case '6':            document.write("0110");            break;        case '7':            document.write("0111");            break;        case '8':            document.write("1000");            break;        case '9':            document.write("1001");            break;        case 'A':        case 'a':            document.write("1010");            break;        case 'B':        case 'b':            document.write("1011");            break;        case 'C':        case 'c':            document.write("1100");            break;        case 'D':        case 'd':            document.write("1101");            break;        case 'E':        case 'e':            document.write("1110");            break;        case 'F':        case 'f':           document.write("1111");            break;        default:            document.write("\nInvalid hexadecimal digit " + hexdec[i]);        }        i++;    }} // driver code// Get the Hexadecimal numbervar hexdec = "1AC5"; // Convert HexaDecimal to Binarydocument.write("\nEquivalent Binary value is : ");HexToBin(hexdec); // This code is contributed by phasing17</script>
Equivalent Binary value is : 0001101011000101
 
Alternate Approach :  
Python
Java
C#
Javascript
# Python3 program to convert# Hexadecimal number to Binary def to4DigitBin(value):     # Converts given binary value into 4-digit    # Binary representation.    # If given value is '10', it returns '0010'    # i.e. 2 times '0' + '10'='00'+'10'    return '0'*(4-len(value))+value  def HexadecimalToBinary(inputHexadecimal):    resultBinary = '' # Initialize Empty string      for eachElement in inputHexadecimal:         # If it's a number digit (in 0 to 9), find it's binary form.        if(eachElement.isdigit()):             # Here bin(number) function returns Binary            # representation of number            # Ex: bin(10) returns '0b1010', so slice away            # the first 2 characters to get '1010'            binaryOfSingleDigit = bin(int(eachElement))[2:]              # Now add the 4-digit Binary representation to            # result string            resultBinary += to4DigitBin(binaryOfSingleDigit)         # Since the element is alphabet (in A to E), (assuming        # only capital letters)        # 'ord(element)-65+10' gives the number representation        # ranging 10 to 16 (for A to E)        # Ex: For 'B', ord('B')=66, thus 'ord('B')-65+10' => '        # 66-65+10' => '11'        elif(eachElement.isalpha() and ord(eachElement) < 71):            resultBinary += to4DigitBin(bin(ord(eachElement)-55)[2:])         # If invalid character is present         else:                       resultBinary = 'Invalid hexadecimal digit: ' + eachElement            break      return 'Equivalent Binary value is: '+ resultBinary  # Driver codeinputHexadecimal = '1AC5'   # input('Enter Hexadecimal: ')print(HexadecimalToBinary(inputHexadecimal))  # This code is contributed by SBVKrishna
/*package whatever //do not write package name here */ import java.io.*; class HexToBinary {    public static void main(String[] args)    {        String s = "1AC5";        String result = hexToBinary(s);        System.out.println(result);    }    private static String hexToBinary(String input)    {        /*Using Integer.parseInt() to get the decimal value         * of the given String*/        int decimalValue = Integer.parseInt(input, 16);         /*Using Integer.toBinaryString() to get the binary         * String of given integer*/        String result            = Integer.toBinaryString(decimalValue);         /*Alternatively you may also merge above operations        to one line like        * String result = Integer.toBinaryString(Integer.parseInt(input, 16));          */        return result;    }}
// C# program to implement the approachusing System; class HexToBinary {   // Driver Code  public static void Main(string[] args)  {    string s = "1AC5";    string result = hexToBinary(s);     // Function Call    Console.WriteLine(result);  }   // Function to convert hex string to binary string  private static string hexToBinary(string input)  {    // Convert the hex string to decimal integer    int decimalValue = Convert.ToInt32(input, 16);     // Convert the decimal value to binary string    string result = Convert.ToString(decimalValue, 2);     return result;  }} // This code is contributed by phasing17
// JS Program to implement the approach function hexToBinary(input){    /*Using parseInt to get the decimal value     of the given String*/    var decimalValue = parseInt(input, 16);     /*Using decimalValue to get the binary    * String of given integer*/    var result = decimalValue.toString(2);         /* Calculating the length of the binary number    with leading zeroes */    var len = 4 * (Math.floor(result.length / 4) + (result.length % 4 ? 1 : 0));         return result.padStart(len, '0');} // Driver Codevar s = "1AC5";var result = hexToBinary(s);console.log(result);console.log("0001101011000101"); // This code is contributed by phasing17
Equivalent Binary value is: 0001101011000101
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Mithun Kumar
Akanksha_Rai
SBVKrishna
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