This variable affects how floating-point arithmetic is performed. Starting with Version 4.3, floating-point arithmetic was enhanced to more closely reflect the way that floating-point values are determined on the host system. This enhancement can affect the behavior of existing programs. To revert to the computation method used prior to Version 4.3, set the value of V42_FLOATING_POINT to 1 (on, true, yes). By default, this variable is set to 0 (off, false, no).