So you want to convert a

number (

decimal) into

binary, do you now? Here's the

pencil and paper method us

old farts got taught

back when the Earth was still young. As an example, we'll convert

163 to binary as we go along.

Take your number and repeatedly divide by 2 (until you reach 1, when there's really not much point in going on (but you can!)). Ignore any remainders (we'll come back later to pick them up).

163
81
40
20
10
5
2
1

Now read the

column of numbers from the

bottom up; write down (from

left to

right!) a "1" for every

odd number, a "0" for every

even number.

In our case, this yields 10100011_{2}=163_{10}.