printf - output a formatted list to a filehandle
printf FILEHANDLE FORMAT, LIST
printf FORMAT, LIST
Equivalent to print FILEHANDLE sprintf(FORMAT, LIST). The first argument of the list will be interpreted as the printf format. If use locale is in effect, the character used for the decimal point in formatted real numbers is affected by the LC_NUMERIC locale. See the perllocale manpage.
Don’t fall into the trap of using a printf() when a simple print() would do. The print() is more efficient, and less error prone.