floating point type holds a floating-point number, with precision dependent on the computer. It also keeps track of the IEEE floating-point exceptions raised in a calculation and an estimate of the significance with which the number should be expressed when it is converted to a string.
All arithmetic operations are carried out to the full precision of the computer; only conversions to string are affected by the estimated significance.
|8.0.584.0||Mac, Red Hat, SUSE, Session, Windows|
|9.0.586.0||AIX, HP-UX, Solaris|