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String plus

#!C:\Perl\Bin\ $num1=25; print "\n\n\$num1 = $num1\n\n"; $num2=10; print "\$num2 = $num2\n\n"; $string1="20"; print "\$string1 = $string1\n\n"; $string2="Maximum Speed "; print "\$string2 = $string2\n\n"; $result1 = $num1 + $num2;        # $result1 contains 35 print "\$result1 = $result1 \n\n"; $result2 = $result1 + $string1;        # $result2 contains 55 print "\$result2 = $result2 \n\n"; $result3 = $string2 . $result2;        # $result3 contains  "Maximum Speed 55" print "\$result3 = $result3 \n\n";