Casting Related Doubt

[achayya matta]

hai ranchers,

i know the fact that when a double number is divided by 0 it doesnt result in exception but it results in value of Infinty...
but the problem i have is when i try to type cast this value of infinity to byte...it results in value of -1 ....
sample code...

double d1 = 1.0;
double d2 = 0.0;
d1= d1/d2; //d1 results in Infinity
byte b = (byte) d1; //b gets assisned -1

can u help me understand y it gets this value assigned..
thnks in advance

[Rob Spoor]

I don't know how infinity is defined in bits, but I'm thinking it's something like 0111 1111 1111 ... 1111 1111 1111. If you cast it to a byte, you cut off everything except for the last part: 1111 1111. This is -1.