How to convert a number to binary ?

PeterH:

Chipakias:
I do not know how to convert a number to binary.

It's not clear what you are trying to do. My guess is that you are trying to produce an ascii string of '1' and '0' characters containing a binary textual representation of an integer, similar to what you'd get if you printed the number to the Serial port with binary format. Is that right?

First of all, thank you all for the immediate correspondence and really sorry for mine late correspondence, but I work too much and the free time is little."

PeterH , Yes ! This is what I want. For example I have an integer x = 100 and I want another variable y to take the binary of 100 => "0 1 1 0 0 1 0 0". As I am a newbie I do not know many things. Please be as simplest and more detailed (regarding commands) as you can!