Today in this tutorial we discuss on the topic is:
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)
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