Scalar variables in Perl

A scalar variable is a variable in Perl in which we can store exactly one item- a line of input,a piece of text,a number etc.

The name of a scalar variable starts with a dollar ($) sign followed by at least one letter which is followed by any number  of digits or letters or underscore (_) sign.

For ex

$x
$var
$var1
$v_1_3_w

all are valid examples of scalar variables.

For ex

var
12
$12
$_ 
are not valid examples of scalar variables.

We can assign values to these variables by using assignment operator (=).
As $var=10;
here value 10 is assigned to variable $var.

These variables can be of any length.
$this_is_really_a_very_very_very_long_variable
is a valid variable.

The variables are case sensitive in Perl
means $var and $Var are different scalar variables.


Here is a simple program

#!/perl64/bin/perl 
 $scalar_variable=10;
 print("The value of scalar variable is ", $scalar_variable);

Output:

               The value of scalar variable is 10