Perl was originally developed for the text processing like extracting the required information from a specified text file and for converting the text file into a different form. These operations can be performed by the use of various inbuilt file functions.
Example:
Perl
Output:
Following are some of the useful functions in Perl to work on Files:
#!/usr/bin/perl
# Opening a File in Read-only mode
open(fh, "<", "File_to_be_read.txt");
# Reading next character from the file
$ch = getc(fh)
# Printing the read character
print"Character read from the file is $ch";
# Closing the File
close(fh);
| Function | Description |
|---|---|
| glob() | Used to print the files present in a directory passed to it as an argument |
| tell() | Used to get the position of the read pointer in a File with the use of its FileHandle |
| getc() | Used to read the next character from the file whose File Handle is passed to it as argument |
| reverse() | Returns the List in reverse order when used in List context and returns a concatenated string of the values of the List, with each character of the string in the opposite order when used in scalar context |
| rename() | Renames the old name of a file to a new name as given by the user |