Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How to Define a Format in Perl?
Perl uses a writing template called a 'format' to output reports. To use the format feature of Perl, you have to define a format first and then you can use that format to write formatted data.
Syntax
Following is the syntax to define a Perl format −
format FormatName = fieldline value_one, value_two, value_three fieldline value_one, value_two .
Here FormatName represents the name of the format. The fieldline is the specific way, the data should be formatted. The values lines represent the values that will be entered into the field line. You end the format with a single period.
Next fieldline can contain any text or field holders. The field holders hold space for data that will be placed there at a later date. A field holder has the format −
@<<<<
This field holder is left-justified, with a field space of 5. You must count the @ sign and the < signs to know the number of spaces in the field. Other field holders include −
@>>>> right-justified @|||| centered @####.## numeric field holder @* multiline field holder
An example format would be −
format EMPLOYEE = =================================== @<<<<<<<<<<<<<<<<<<<<<< @<< $name $age @#####.## $salary =================================== .
In this example, $name would be written as left justify within 22 character spaces and after that age will be written in two spaces.
54 Views
