Q.Write the rules for forming variable name.

A variable name is an identifier that names a memory location whose value can change, and it must obey C's naming rules. …

[!TLDR]

A variable name starts with a letter/underscore, uses only letters/digits/underscore, is not a keyword, has no spaces, is case-sensitive, and must be declared before use.

A variable is a named location in memory whose value may change during execution. The rules for forming a valid variable name are:

1. The first character must be an alphabet (A-Z, a-z) or an underscore ( _ ).
2. The following characters may be letters, digits (0-9) or the underscore.
3. No blank spaces and no special characters (other than the underscore) are permitted.
4. Keywords must not be used as variable names.
5. Variable names are case-sensitive - Total and total are different.
6. The name should be meaningful, and it must be declared with its data type before it is used.

Examples: