byte type variable...

Please comment/ correct followings:

a- Following numbers are integer literal (they are int type):
     1,   99,   150, etc.

b- We need type cast in the following when >127:
byte b1 = 12;
byte b2 = 127;
byte b3 = (byte)129;

Question: How come we are getting:

byte b = (byte)129;       gives -127
byte b = (byte)1290;       gives 10


Thank you.

LVL 34
Mike EghtebasDatabase and Application DeveloperAsked:
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I guess, this is how overflow works
Maximum byte number is 127 when you add 1 it bcomes -128, as first bit changes the sign when you add one more it becomes -127

with 1290 this process goes many times around and it becomes 10 in the end

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