Perl ABCPOSIX - Functions defined in POSIX
The POSIX module allows you to use the functions defined in POSIX.
# Use of POSIX modules use POSIX qw/ceil floor/;
Math - related functions
Use ceil to round up the decimal point.
# Round up the decimal point $result = ceil $num;
Use floor to round down the decimal point.
# Decimal point devaluation $result = floor $num;
To see a list of POSIX functions
Perl has a large number of POSIX functions defined. See perldoc's POSIX documentation for a list of POSIX functions.