Delve into Perl, a popular text processing language. Gain insights into loops, strings, and arrays, progressing to complex data structures and packages. No prior knowledge required.

alpine2.tar.gz

Perl is one of the most popular text processing languages in the world. It allows you to create extremely efficient text parsers for all sorts of applications.

This interactive course will help you get up to speed on Perl, starting off with basic concepts like loops, strings, and arrays. You'll build your way up to more complex topics like data structures and packages.

No background knowledge is needed. Anyone willing to understand the principles and syntax of Perl to use it in the future will find this course useful.

Learn Perl from Scratch

Let’s look at the solution first before jumping into the explanation:

$rows = 5;

 for($i = 1; $i <= $rows; $i++)
 {
   for($j = 1; $j <= $i; $j++)
   {
     print "a ";
   }
   print "\n";
 }

## Explanation

The outer `for` loop executes `$rows` times, and the inner `for` loop executes once for the first iteration of outer loop, twice for the second iteration of the outer loop, and so on. The inner loop prints an `a` character on the console every time it executes. At the end of the inner loop, it prints a `\n` to get us on a new line.

# Explanation

The outer `for` loop executes `$rows` times, and the inner `for` loop executes once for the first iteration of outer loop, twice for the second iteration of the outer loop, and so on. The inner loop prints an `a` character on the console every time it executes. At the end of the inner loop, it prints a `\n` to get us on a new line.

# Explanation

The outer `for` loop executes `＄rows` times, and the inner `for` loop executes once for the first iteration of outer loop, twice for the second iteration of the outer loop, and so on. The inner loop prints an `a` character on the console every time it executes. At the end of the inner loop, it prints a `\n` to get us on a new line.

In this lesson, we'll look at the explanation of the last challenge.

Getting Started

Variables

Operators

Conditional Statements

Loops

Subroutines

Strings

Arrays

Packages

Conclusion

Solution Review: Printing Pyramid

Explanation