CHAR_BIT : It is the number of bits in char. These days, almost all architectures use 8 bits per byte (But it is not the case always, some older machines used to have 7-bit byte). It can be found in

Let us see an application of it. Suppose we wish to print byte by byte representation of an integer.

Examples :

Input  : 4
Output : 00000000 00000000 00000000 00000100

Input  : 12
Output : 00000000 00000000 00000000 00001100 




// CPP program to print byte by byte presentation
#include <bits/stdc++.h>
using namespace std;
// function in which number and intitally 0 is passed
void printInBinary(int num)
    int n = CHAR_BIT*sizeof(num);
    stack<bool> s;
    for (int i=1; i<=n; i++)
        num = num/2; 
    for (int i=1; i<=n; i++)
        cout <<;
        // Put a space after every byte. 
        if (i % CHAR_BIT == 0)
        cout << " "
int main()
    int num = 12;
    return 0;


Output :

00000000 00000000 00000000 00001100 

This article is contributed by Apurva Agarwal. If you like GeeksforGeeks and would like to contribute, you can also write an article using or mail your article to See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.

My Personal Notes arrow_drop_up
Article Tags :
Practice Tags :


Please write to us at to report any issue with the above content.