Question

write any three rules for naming a variable
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Answer 1

Rules for naming variables:

• Variable names in Visual C++ can range from 1 to 255 characters. To make variable names portable to other environments stay within a 1 to 31 character range.

• All variable names must begin with a letter of the alphabet or an underscore( _ ). For beginning programmers, it may be easier to begin all variable names with a letter of the alphabet.

• After the first initial letter, variable names can also contain letters and numbers. No spaces or special characters, however, are allowed.

• Uppercase characters are distinct from lowercase characters. Using all uppercase letters is used primarily to identify constant variables.

• You cannot use a C++ keyword (reserved word) as a variable name.

Answer 2

Rules for naming variables:

• All variable names must begin with a letter of the alphabet or an. underscore( _ ). ...
• After the first initial letter, variable names can also contain letters and numbers. ...
• Uppercase characters are distinct from lowercase characters. ...
• You cannot use a C++ keyword (reserved word) as a variable name.

Sorry I know 4 rules

so written 4 rules only