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JavaScript variable naming rules_basic knowledge

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2016-05-16 18:46:051521browse

JScript is a case-sensitive language.

The first character must be an ASCII letter (upper or lower case), or an underscore (_). Note that the first character cannot be a number.
Following characters must be letters, numbers or underscores.
Variable names must not be reserved words.

Some examples of legal variable names are given below:
_pagecount Part9 Number_Items Some examples of invalid variable names are given below:

99Balloons // Cannot start with a number. Smith&Wesson // The ampersand (&) character is invalid for variable names.

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