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simple binary question to double confirm.

SJ K
Level 5
Level 5

Hi all,

 

There are still time to time whereby i can confuse on (8bits or 2^7) and 2^8

It is known that 8 bits give you 256 value.

 

q1) But in actual fact 8 bits turn on is not 2^8 isnt it ?, it is actually 2^7 + 2^6  all the way to 2^0
 

7

6

5

4

3

2

1

0

2^7

2^6

2^5

2^4

2^3

2^2

2^1

2^0

128

64

32

16

8

4

2

1

 

q2) And adding all of them up (128+64+32....) only give me 255 which i believe the missing "1" is the digit 0; hence 0-255 = 256 values, am i right ?

 

Regards,
Noob

1 Reply 1

SJ K
Level 5
Level 5

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