Скачать или смотреть JavaScript Tutorial For Beginners - 08 | JavaScript Keywords | JavaScript Identifiers

javascript, JavaScript Keywords, JavaScript Identifiers,
Today in this tutorial we discuss on the topic is:
JavaScript Keywords & Identifiers:
JavaScript statements are often start with a keyword to identify the JavaScript action to be performed.
JavaScript Identifiers:
All JavaScript variables must be identified with unique names.
These unique names are called identifiers.
Identifiers can be short names (like x and y) or more descriptive names (age, sum, total Volume).
The general rules for constructing names for variables (unique identifiers) are:
 Names can contain letters, digits, underscores, and dollar signs.
 Names must begin with a letter.
 Names can also begin with $ and _ (but we will not use it in this tutorial)
 Names are case sensitive (y and Y are different variables)
 Reserved words (like JavaScript keywords) cannot be used as names