Question

what is variable?state the rules to be followed while defining a variable name.​

Answer 1

Variables

In programming, a variable is a container (storage area) to hold data.

To indicate the storage area, each variable should be given a unique name (identifier). Variable names are just the symbolic representation of a memory location.

Rules for naming a variable

A variable name can only have letters (both uppercase and lowercase letters), digits and underscore.

The first letter of a variable should be either a letter or an underscore.

There is no rule on how long a variable name (identifier) can be. However, you may run into problems in some compilers if the variable name is longer than 31 characters.