Help for this page
[0] Perl> print fmod( $_, 100 ) for 12300, 12301, 12399, .00001;; 0 1 99 1e-005
[0] Perl> print fmod( $_, 1 ) for map{ ($_, -$_ ) } 12300, 12301, 1239 +9, .00001;; 0 ... 0 1e-005 -1e-005