Have a good introduction to the Perl program

Question 2. chomp($str=);

my @array=split/[ str;

my $mx = array[0];

for my $e(@array)

print "The maximum value is $mx";

<> Question 3. chomp($str=);

my @array=split/[ str;

my @sorted_num=sort@array;

my $string=join(",sorted_num);

print "The sorted number column is: $string";

<> Question 4. chomp($str=);

my @array=split//,str;

my %ha;

my @uniq=grep<2}@array;

my $size=@array;

my $n;my $foundno;my $regex;my $freq;

print "Amino acid t-frequency t-frequency";

for($n=0;$n<@uniq;$n++)regex=@uniq[$n];

foundno=0;

foundno++ while($str=~m/$regex/g);

freq=$foundno*100/$size;

print "$regex\t$foundno\t$freq%";

Perl has the power and flexibility of high-level languages such as C. In fact, you'll see that many of its features are borrowed from the C language.

Like scripting languages, perl doesn't need a compiler or linker to run, all you have to do is write the program and tell perl to run. This means that Perl is ideal for quick solutions to small programming problems and for creating prototypes for large events to test potential solutions.

Perl offers all the features of scripting languages such as sed and awk, and also has a lot of features that they don't. Perl also supports SED to Perl and AWD to Perl translators.

In short, Perl is as powerful as C and as convenient as scripting and describing languages like AWK and SED.

The program is not perfectly written at the time of installation or uninstallation.

Finch: A Primer to the Perl Language, also known as the "Little Camel Book", is one of the most relied upon enlightenment books by Perl programmers. The book has been a best-selling language teaching material for Perl since 1993, and this new edition covers the latest changes in Perl. The authors of this book have been engaged in Perl teaching at Stonehenge Consulting since 1991, and their years of classroom teaching practice and accumulated experience have formed the unique teaching rhythm of this book, as well as the pragmatic knowledge trade-offs.

The exercises that accompany the text allow you to consolidate various concepts in a timely manner, strengthen your understanding and absorption. This book covers:

The variable type of perl.

Subroutine. Actions on files.

Regular expression.

String operations.

List & Sort.

Management of processes.

Smart matching. Use of Third-Party Modules.

Some people just want to get things done, and the Perl language is made for that. The original goal of Perl was simply to assist Unix system administrators with the tedious day-to-day chores of text data processing. Today, Perl has evolved into a full-featured programming language that can accomplish a wide range of tasks on virtually any operating system – from simple command-line tools to web application development to bioinformatics, financial data analytics, and more.

Unlike other books that may focus on teaching you how to program in Perl, we want you to become a real Perl programmer.