Names
Names are a string of characters written into a source file to refer to something that’s available to the program.
Basic use
Any contiguous span of letters and digits is interpreted as a name. Underscores and dots can be used between letters and digits.
-- These are valid names.
Hello
this_is_my_name
ItsVeryCool
Testing123
360_degrees
3.14159
wolf.phfox.net