# Binary to Hexadecimal Conversion

“** Binary to Hexadecimal Conversion**” is one of the classic programming exercise problem. Here, we are given a Binary Number, entered by user and our task is to write a program to convert the given binary number to its equivalent hexadecimal number.

** Example** (Binary to Hexadecimal Conversion):

Binary = 100011011Hexadecimal = 11B

The steps required for Binary to Hexadecimal Conversion are as follows:

- Make sure the number of digits in binary number is divisible by 4. If not, add extra 0s in front.
- Divide the binary number into pairs of 4-digit binary number.
- Convert each 4-digit binary number pair to its Hexadecimal character.
- Combine all the Hexadecimal characters and store into temporary variable as ‘Hexadecimal’.
- Print the result.

**C++ Program for Binary to Hexadecimal Conversion is as follows:**

```
/* C++ Program for Binary to Hexadecimal Conversion*/
#include<bits/stdc++.h>
using namespace std;
int main()
{
/* Scan the Binary Number */
string Binary;
cout<<"Enter the Binary Number: ";
cin>>Binary;
/* Converting Binary to Hexadecimal*/
/* Make sure the number of digits in 'Binary'
Number is divisible by 4. If not, add
required 0s in front*/
while(Binary.length() % 4 != 0)
{
Binary.insert(0,"0");
}
/* Converting each digit of Binary number
into 4-digit binary number pair and convert
each pair to its corresponding Hexadecimal
character
*/
string Hexadecimal = "";
for(int i = 0; i < Binary.length(); i=i+4)
{
string temp;
temp = temp + Binary[i];
temp = temp + Binary[i+1];
temp = temp + Binary[i+2];
temp = temp + Binary[i+3];
if(temp == "0000")
Hexadecimal += '0';
else if(temp == "0001")
Hexadecimal += '1';
else if(temp == "0010")
Hexadecimal += '2';
else if(temp == "0011")
Hexadecimal += '3';
else if(temp == "0100")
Hexadecimal += '4';
else if(temp == "0101")
Hexadecimal += '5';
else if(temp == "0110")
Hexadecimal += '6';
else if(temp == "0111")
Hexadecimal += '7';
else if(temp == "1000")
Hexadecimal += '8';
else if(temp == "1001")
Hexadecimal += '9';
else if(temp == "1010")
Hexadecimal += 'A';
else if(temp == "1011")
Hexadecimal += 'B';
else if(temp == "1100")
Hexadecimal += 'C';
else if(temp == "1101")
Hexadecimal += 'D';
else if(temp == "1110")
Hexadecimal += 'E';
else if(temp == "1111")
Hexadecimal += 'F';
}
/*Printing the result */
cout<<"The Hexadecimal of "<<Binary<<" is "<<Hexadecimal;
}
```

Enter the Binary Number: 100011011 The Hexadecimal of 000100011011 is 11BOUTPUT:

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