Back on April 6<\/a> I showed how to use awk<\/strong> to do calculations on the command line. From my understanding, awk is native to Linux, but not Windows.<\/p>\n If you’ve got Perl installed on Windows (which I talked about starting here<\/a>), you can do command-line math using Perl. Of course, the Linux users can as well: Perl comes native on Linux.<\/p>\n Let’s examine the following Perl code, which can be entered on the command line: The period . in the middle is a concatenation operator; it means, when doing the print<\/span>, that what comes after the period should be printed next. indicates the printing of a newline. The Perl chr(number<\/em>)<\/span> operator means “print the character designated by this number.” The number 10 translates to the newline character.<\/p>\n So, to summarize, the command line Perl code 3.14159265<\/span><\/p>\n then a newline.<\/p>\n HTH:)<\/p>\n Source:<\/p>\n Robert’s Perl tutorial<\/a><\/p>\n
\n
\nperl -e “use Math::Trig;print acos(-1) . chr(10)”
\n<\/span>
\n
\nperl -e “…….code…….<\/em>”
\n<\/span>
\nmeans that the quotes contain Perl code to be executed straight from the command line.
\n
\nuse Math::Trig;
\n<\/span>
\nloads the Perl Trig functions beyond just sin and cos.
\n
\nprint acos(-1) . chr(10)
\n<\/span>
\ndisplays the answer to arccos(-1)<\/strong>, aka inverse cos(-1)<\/strong>, which is pi: 3.14159265<\/p>\n
\n
\nchr(10)
\n<\/span><\/p>\n
\n
\nperl -e “use Math::Trig;print acos(-1) . chr(10)”
\n<\/span>
\nshould output<\/p>\n