#!usr/bin/perl -w $string = "one fish, two fish , three fish"; $start = -1; while (($start = index($string, "fish",$start))!= -1) { print $start; print "\n"; $start++; } print rindex($string, "fish"); print "\n"; print substr($string ,4), "\n"; print substr($string ,4, 4), "\n"; print substr($string ,4,-1), "\n"; print substr($string ,-10), "\n"; print "replace\n"; substr($string ,0,0) = "some"; print $string;
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