select FILEHANDLE select Returns the currently selected filehandle. If FILEHANDLE is supplied, sets the

pack TEMPLATE,LIST Takes a LIST of values and converts it into a string using the rules given by the TEMPLATE. The resulting string is the

binmode FILEHANDLE, LAYER binmode FILEHANDLE Arranges for FILEHANDLE to be read or written in "binary" or

scalar EXPR Forces EXPR to be interpreted in scalar context and returns the value of EXPR.

getppid Returns the process id of the parent process. Note for Linux users: Between v5.8.1 and v5.16.0 Perl

die LIST die raises an exception. Inside an

printf FILEHANDLE FORMAT, LIST printf FILEHANDLE printf FORMAT, LIST printf

qx/STRING/ Generalized quotes. See Quote-Like Operators in perlop

sprintf FORMAT, LIST Returns a string formatted by the usual

if These flow-control keywords are documented in Compound