I happen to have written a module that handles the evaluation of expressions without messing with unsafe solutions such as eval: Math::Expression::Evaluator. It does the hard part of the task for you.

Please show some effort. :)

update

You are welcome to show code examples and ask more detailed questions.

@consideration!

The OP is not empty but malformed

 <i want to know the basic idea for writing a perl script which will read a mathematical expression from user, evaluate the result and print on the screen. ></i>

should be edited not reaped.

http://www.linuxquestions.org/questions/linux-newbie-8/perl-script-for-reading-a-mathematical-expression-4175492856/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+linuxquestions%2Flatest+%28LQ+-+Latest+Threads%29