Binary & Octal Numbering System

Binary Numbering System

Binary Number system is the way of Computer to communicate.

In a normal number system, Decimal is Ten (10), which is 0 to 9.

But in Binary, which is Bi mean two. So only 0 and zero.

In a Binary system, there is On and Off.

1 equal to On and 0 equal to Off.

For example : 1010110, equal to On, Off, On, Off, On, On and Off

To represent a number in Binary, we must make a power of 2 from the right side.

For example, 123. So at the first we make the table of 2 power:

128 | 64| 32 | 16 | 8 | 4 | 2 | 1

And then we fill it, according to the table.

128 | 64| 32 | 16 | 8 | 4 | 2 | 1

  0       1      1      1      1    0    1    1

So from 123, we get the binary number is 111011.

At this video, we only use 8 bit system. So its only from 1 until 128 as the maximum number

Link : http://www.youtube.com/watch?v=LwR2qVJof14

Octal Numbering System

Octal Numbering System is also called base 8 number system. Because it must be multiply or divide by 8.

So for the first, we make the table of 8 power from the right side. Which is:

512 | 64 | 8 | 1

We can freely fill the table. For example like this table,

| 512 | 64 | 8 | 1 |

               4     3    6

So the result is,  (4 x 64) + (3 x 8) + (6 x 1) =  286.

Or the other example is like this Table:

Decimal	Octal
0	0
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	10
9	11
10	12

That’s is the converted number from decimal to octal. Which is from 0 to 7 has the same number.

But from 8 or more, it has a different number. Because we must fill it according to the table.

Link : http://www.youtube.com/watch?v=pOMIl-ZNGvs

| DECKY RIDHO S | 112110107 |