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:

$range = 6;    # change range to print sequence till that point

$ans = "";
$first = 0; 
$second = 1;
$fibonacci = 0;

for ($c = 0 ; $c < $range ; $c++ )
{
  if ( $c <= 1 ){
    $fibonacci = $c;
    $ans .= $fibonacci . " ";
  }
  else{
    $fibonacci = $first + $second;
    $first = $second;
    $second = $fibonacci;
    $ans .= $fibonacci . " ";
  }
}
$ans =~ s/\s+$//;

print $ans;

## Explanation

We have initialized the `$range` variable up to which we print the sequence. We run the `for` loop until this `$range`. In the first two iterations of the loop, we append the "0" and "1" in the `if` condition, and for every iteration onwards, we find `$fibonacci` by adding the previous two elements.

# Explanation

We have initialized the `$range` variable up to which we print the sequence. We run the `for` loop until this `$range`. In the first two iterations of the loop, we append the "0" and "1" in the `if` condition, and for every iteration onwards, we find `$fibonacci` by adding the previous two elements.

# Explanation

We have initialized the `＄range` variable up to which we print the sequence. We run the `for` loop until this `＄range`. In the first two iterations of the loop, we append the "0" and "1" in the `if` condition, and for every iteration onwards, we find `＄fibonacci` by adding the previous two elements.

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: Fibonacci Sequence

Explanation