Question

Explain the naming rules for creating variables, and then provide three examples using the data types int, double, and char and assign values to them.

Answer 1

I will answer for Javascript language.

Naming rules for creating variables:

The first character must begin with:

• Letter of the alphabet.
• Underscore ( _ ) (not recommended).
• The dollar sign ($). (not recommended).

After the first character:

• Letters.
• Digits 0 to 9. No spaces or special characters are allowed.

About length:

• No limit of length but is not recommended to use large names.

About case-sensitive:

• Uppercase letters are distinct from lowercase.

About reserved words:

• You can't use a Javascript reserved word for a name.

Example:

var ten = 10;

var pi = 3.14;

var name = 'Josh';