Updated April 12, 2023
Introduction to Perl string length
The Perl string length is defined as the string class which is used to determine the length of the user-input strings. It calculates each and every character of the strings and the length will be stored in the separate variable. The length may be any integer numbers it will be the positive integer when we want to retrieve the length of the string characters by using the length() function it also referred as the size of the user input string values with the help of loop the values are iterated and displayed on the output console.
Syntax:
The Perl has the default keywords, functions, and variables to create the application for both user-friendly and sophisticated nature. Mainly the web-based applications are used the Perl scripts are frequent nature. Like that string is one of the frequent classes of the Perl scripts as like that other programming languages. By using the length() function the string length is calculated.
#! /usr/bin/perl
$var name="";
$var2=length($var name);
---some perl script logic codes---The above script codes are the basic steps for getting the string characters length of the user input values.
How to calculate string length in Perl?
We already know that Perl is an interpreted language it’s not a compile language that’s way the script code takes more time to consuming the output on the user console. By using the string length() it will return the number of characters as already the user mentioned on the user input that scalar string values are iterated and checked the each and every individual character because ewe cant use the length function directly for finding the util classes like arrays etc. Because the array length also calculates more similar to the string lengths because when we calculate the string length the index also needed the length function is available and needed only for the characters so it followed the Unicode type of expressions and it can be the returning the number of characters it’s not included the number of bytes. In Perl script, $character set of string data types allowed two sets of Unicode also by using some escape sequences like both forward and backward slashes by including the curly braces the string character lengths are calculated the byte length is different from the character lengths. With the help of length function, we can arrange the elements in both ascending and descending orders with help of sort function but the length will be calculated using the length function. Moreover, the sorting order is followed and use the string characters also.
Examples
Let us discuss examples of Perl string length.
Example #1
Code:
#!/usr/local/bin/perl
use strict;
use warnings;
my $input = "Welcome To My Domain Have a Nice Day Users";
my $stlength = length($input);
print "Thank you users your input string length is $stlength\n";
my $input1 = "\x{6585}\x{292873}\n{747478}";
{
use bytes;
print "Thank you users you strings are converted into bytes please find the byte lengths is: ", length($input1), "\n";
}
print "Have a nice day users teh length is ", length($input1), "\n";
my $output = "2asgdhvg jasfdh37 jefjdg j hjehrj kerjgh kjerkj jerg ejrgk jertthui jergjk ejrh ejrhj ekjrhb kerljh erkj kerhtg ejrktgt ejr";
my @input2 = split(' ',$output);
my $result=length($output);
print "Thank you users $result\n";Output:
In the above first example, we discussed the string characters as the different set of input lengths and it called the functions by using the different sequences. It also used the same sort of orders that can be arranged the string characters in sequence type the characters and bytes are the two set of default data types the length will be calculated and also the string characters are using some split() method for splitting the number of characters and strings in the big variable sentences. It will be used for calculate the length with short time and easily identified the strings in the output console.
Example #2
Code:
#!/usr/local/bin/perl
use strict;
use warnings;
my $inp = "Welcome To My Domain Have a Good Day Users";
my $stlen = length($inp);
print "Thank you users your input string length is $stlen\n";
my $vars1 = substr($inp, 3, 7);
my $vars2 = substr($inp, -8);
print($vars2,":",$vars1,"\n");
substr($inp, 3, 7, "Violet");
print($inp,"\n");
my $inp1 = "sdvjh jsdfh jsdf jsdfj ekfb jefb ewhfrb wehfrb wehf kjewhf jef ejhfrb jwehrfb jewhrfb jehwrb jehrfb hewrbds7 wey87 ewf87 hehj hef";
{
use bytes;
print "Thank you users you strings are converted into bytes please find the byte lengths is: ", length($inp1), "\n";
}
print "Have a nice day users the length is ", length($inp1), "\n";Output:
In second example we used the length() function in basic string character length calculations and also we can evaluate the characters, as well as the string characters, are converted to the bytes. The String class has some of the default methods like length(), substr() the substring has been calculated for reducing the string character lengths so the runtime user inputs are segregated using the substr method and some tokenizers to split the string characters and calculates the length of the user inputs.
Example #3
Code:
#!/usr/local/bin/perl
use strict;
use warnings;
print "Welcome To My Domain Have A Nice Day Users gjf h kjjfdh kjehf kjerh jkf\n";
my $vars = <>;
my $vars1="hdjg kwjeh hwekfjr jerhk kerjhkj kjekrh jerhk erkjhgw emrhe9485 nerk798 nkjj5kfjkrfg jrk ajgdv jgve bejh ewbrj whe bjehrgw h4jhr wejhrg";
chomp($vars);
if (lc($vars))
{
print "Have a Nice Weekend and For Your Information the name is $vars !\n ",length($vars), length($vars1);
}
else
{
print "Thanks Users and Your entered data is not $vars!\n";
}Output:
In the Final example we used length() and additionally another default method like chomp() method for while passing the user input values as the string by using this method it will reduce the spaces and was to removed the trailing newlines from the input string. By using if condition the input should be validated and checked conditions if the condition is satisfied it executes the statements else the else statement will be executed.
Conclusion
In Perl script string classes have some default methods for calculates and utilized the string characters in a frequent manner. The Perl string-length() function it execute and followed the byte and characters of the user input it will in the runtime or before. So the user input should be in the string quote characters for calculating the length.
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This is a guide to Perl string length. Here we discuss the introduction, syntax, How to calculate string length in Perl? and examples with code implementation. You may also have a look at the following articles to learn more –
