Single Quote (') and Double Quote (") Used to define string literals. Single quotes are used for simple strings, and double quotes allow for variable interpolation and escape sequences. Backslash () ...
How to use single and double quotation marks in strings? In all programming languages, you must open and close your string with quotation marks, but you don't have to, if your interpreter doesn't ...
The Internet Engineering Task Force (IETF) document, RFC 3696, “Application Techniques for Checking and Transformation of Names” by John Klensin, gives several valid e-mail addresses that are rejected ...
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