Write, Run & Share Perl code online using OneCompiler's Perl online compiler for free. It's one of the robust, feature-rich online compilers for Perl language, running on the latest version 5.22.1. Getting started with the OneCompiler's Perl compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as Perl and start coding.
OneCompiler's Perl online editor supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample Perl program which takes name as input and prints hello message with your name.
Perl(Practical Extraction and Report Language) is especially desined for text processing by Larry Wall.
There is no need to specify the type of the data in Perl as it is loosely typed language.
| Type | Description | Usage |
|---|---|---|
| Scalar | Scalar is either a number or a string or an address of a variable(reference) | $var |
| Arrays | Array is an ordered list of scalars, you can access arrays with indexes which starts from 0 | @arr = (1,2,3) |
| Hash | Hash is an unordered set of key/value pairs | %ul = (1,'foo', 2, 'bar) |
In Perl, there is no need to explicitly declare variables to reserve memory space. When you assign a value to a variable, declaration happens automatically.
If, If-else, Nested-Ifs are used when you want to perform a certain set of operations based on conditional expressions.
There is no case or switch in perl, instead we use given and when to check the code for multiple conditions.
For loop is used to iterate a set of statements based on a condition.
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
Sub-routines are similar to functions which contains set of statements. Usually sub-routines are written when multiple calls are required to same set of statements which increases re-usuability and modularity.