| 1 |
Double Quoted strings are very similar to C with a lot of special characters given in table 2-1 of Llama book and online PERL man page. (See later in foils)
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Examples: \n is newline, \t is tab and \cC is Control-C
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Example: 'Hello
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World' is equivalent to "Hello\nWorld"
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Note \L instructs PERL that all following characters until a \E are to be interpreted as lower case.
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\U ... \E is similar but intervening characters are Upper case
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| 2 |
A critical feature of double quoted strings is that they can include variables designated by $ as initial character. For this reason use \$ to denote a real dollar sign in double quoted string.
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| 3 |
Variables are NEVER interpolated in single quoted strings
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