Perl | Scalars
Last Updated :
12 Feb, 2021
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A scalar is a variable that stores a single unit of data at a time. The data that will be stored by the scalar variable can be of the different type like string, character, floating point, a large group of strings or it can be a webpage and so on.
Example :
# Perl program to demonstrate
# scalars variables
# a string scalar
$name = "Alex";
# Integer Scalar
$rollno = 13;
# a floating point scalar
$percentage = 87.65;
# to display the result
print "Name = $name\n";
print "Roll number = $rollno\n";
print "Percentage = $percentage\n";
Output :
Name = Alex Roll number = 13 Percentage = 87.65
Numeric Scalars
Numeric scalar variables hold values like whole numbers, integers(positive and negative), float(containing decimal point). The following example demonstrates different types of numerical scalar variables in perl.
Example :
# Perl program to demonstrate various types
# of numerical scalar variables
# Positive integer numerical
# scalar variables
$intpositive = 25;
# Negative integer numerical
# scalar variables
$intnegative = -73;
# Floating point numerical
# scalar variables
$float = 23.5;
# In hexadecimal form
$hexadec = 0xcd;
# to display the result
print "Positive Integer = $intpositive\n";
print "Negative Integer = $intnegative\n";
print "Floating Point = $float\n";
print "Hexadecimal Form = $hexadec\n";
Output :
Positive Integer = 25 Negative Integer = -73 Floating Point = 23.5 Hexadecimal Form = 205
String Scalars
String scalar variables hold values like a word(made of different characters), a group of words or a paragraph. The following example demonstrates different types of string scalar variables.
Example :
# Perl program to demonstrate various types
# of string scalar variables
# String scalar
$alphastring = "GeeksforGeeks";
$numericstring = "17";
$alphanumeric = "gfg21";
#special character in string scalar
$specialstring = "^gfg";
# in single quotes
$singlequt = 'Hello Geeks';
# To display the result
print "String with alphabets = $alphastring\n";
print "String with numeric values = $numericstring\n";
print "String with alphanumeric values = $alphanumeric\n";
print "String within Single quotes = $singlequt\n";
print "String with special characters = $specialstring\n";
Output :
String with alphabets = GeeksforGeeks String with numeric values = 17 String with alphanumeric values = gfg21 String within Single quotes = Hello Geeks String with special characters = ^gfg
