Matt Riddell wrote:
Chee Foong wrote:
i guess may be it's a 64bit variable. so you can only use 0-63.
LOL!!!!
Bits work like this
[128][64][32][16][8][4][2][1]
So, you have a whole lot of bits, each one moving from right to left inceases
a power of 2. Say you wanted to represent 10, then you would turn on the 8
and the 2 (8+2=10) so the binary representation (for an 8 bit variable) would
be:
00001010
So, from that you can see that you could get from 0-255 in 8 bits.
If however you wanted the number to be able to go negative as well then you
would use one of the bits to determine the sign (i.e. +/-)
That would give you possible values between -127 and +127.
So, a max value of 63 would either indicate a signed 7 bit variable (dunno
where the other one went) or an unsigned 6 bit variable.
But I am on the other side of the equator from you!
Should I move from left to right or should I reverse the polarity to get
the same results?
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