Perl conditionals and loop usage

[ghosh22]

hii guys..Got one small question..really got confused with perl conditionals and loop. Would you please elaborate where to use:
if..elsif
while
for
foreach
unless
do
in a program? Which one is best for which purpose?
Many thanks in advance..

[mitchems]

RTFM. We're here to help, but not to teach you Perl.

[DavidRogers]

Here's a FM: http://perldoc.perl.org/perlintro.html#Conditional-and-looping-constructs