Which programming languages support variable variables? Can you give some examples?
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Variable variables, also known as dynamic variables, are a feature in some programming languages that allow variables to be created and accessed using the values of other variables.

Here are some examples of programming languages that support variable variables:

PHP: In PHP, variable variables are created by placing an extra dollar sign before the name of the variable that contains the variable name. For example:

php

$name = 'age';
$$name = 27;
echo $age; // Output: 27
Perl: In Perl, variable variables are created using the eval function. For example:

perl

my $name = 'age';
my $value = 27;
eval "\$$name = $value";
print $age; # Output: 27
Ruby: In Ruby, variable variables can be created using the instance_variable_get and instance_variable_set methods. For example:

ruby

name = :age
value = 27
instance_variable_set("@#{name}", value)
puts instance_variable_get("@#{name}") # Output: 27
Python: Python doesn't have a built-in feature for variable variables, but it is possible to achieve similar functionality using dictionaries. For example:

python

name = 'age'
values = {name: 27}
print(values[name]) # Output: 27
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