perl基础-2 (Perl编程24学时教程)

概述#!$radius =50;$area = 3.14*($radius**2);print $area ,"\n";##############################################if ('leon' =~ /\bleon\b/) {print ("I am leon!\n");}else {print ("who

#!$radius =50;$area = 3.14*($radius**2);print $area,"\n";##############################################if ('leon' =~ /\bleon\b/) {print ("I am leon!\n");}else {print ("who am i?\n");}##############################################$a = 'hello world ';$b = "fuck u";print  $a+$b,"\n";print  $a.$b,"\n";##############################################$name = "leon";$astring = 'my name is $name';$bstring = "my name is $name";$cstring = "my name is $name";print  $astring,"\n";print  $bstring,"\n";print  $cstring,"\n";##############################################$mstring = "fuck " x 10;print $mstring,"\n";print $Ustring = uc(leon),"\n";print lc($Ustring),"\n"; print rand(),"\n"; $instring = "zzz";$instring++;print $instring,"\n"; $instring--;            #what???print $instring,"\n"; 

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