Hi guys, I'm totally in shock that in C programming there's what's called "INFINITY micro" which it means infinity as we have in mathematics.

My question and sorry for that silly question, how does PC/compiler assign INFINITY value whenever it's INFINITY ? is it just assigning it as big big big number which can deal with it as INFINITY ? I mean how PC/compiler consider INFINITY as?
In math INFINITY just a concept .. a bigger bigger number .. but in PC sounds different

thanks