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Practical Getting started with Perl. Bioinformatics. Dr. Aladdin Hamwieh Khalid Al- shamaa Abdulqader Jighly. Aleppo University Faculty of technical engineering Department of Biotechnology. 2010-2011. Basics. Command Line Text File Inputs & Outputs Variables ($) " " and ' '

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Bioinformatics

Practical

  • Getting started with Perl

Bioinformatics

Dr. Aladdin Hamwieh Khalid Al-shamaa

Abdulqader Jighly

Aleppo University

Faculty of technical engineering

Department of Biotechnology

2010-2011


Basics
Basics

  • Command Line

  • Text File

  • Inputs & Outputs

  • Variables ($)

  • " " and ' '

  • New Line (;)

  • Comments (#)


# first test

print "hi everybody! \n";

print ‘Your name is:';

$name = <STDIN>;

print "Hi $v";

exit 0;


Basic arithmetic operators
Basic arithmetic operators

  • Operator Function

    + Addition

    - Subtraction

    * Multiplication

    / Division

    % Modulus (remainder)

    ** Exponent (to the power of)

    ++ Increment

    -- Decrement


Basic arithmetic operators1
Basic arithmetic operators

  • $v = 4;

  • $a = 2 + 3;

  • print "\$a = \$a \n";

  • $a = $a -1;

  • $a -= 1;

  • $a--;

  • print "$a \n";

  • $x = 2 + 3;

  • print '\$x = $x \n';


Note

12/3*4=16

BUT

12/(4*3)=1


Order of precedence
order of precedence

Operator

**

/

*

%

+

-


Training
Training

  • Input:

    • n

  • Output:

    • X


Homework
Homework

X

  • Inputs:

    • Height (X)

    • Width (Y)

  • Outputs:

    • Perimeter

    • Area

Y



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