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Lets look at variables. These allow us to perform some computational experiments with Perl.
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Perls most basic variable is the scalar variable. Scalar variables hold both strings and numbers, and are remarkable in that strings and numbers are completely interchangable. For example, the statement
$virus_type = 9;
sets the scalar variable $virus_type to 9, but you can also assign a string in a similar way:
$virus_type = 'nine';
Perl also accepts numbers as strings, like this:
$email_number = '9';
$email_number = '0009';
Once you have declared a variable, like above, you can perform many computational tasks on them.
Name Conventions
Variable names must follow these conventions:
1. must be made from characters, numbers or underscores
2. must start with either characters or numbers....not underscores
3. can not start with $_
4. are case sensetive ....ie Temp and TEMP are diferent variables.
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