About Lesson
Variables
A variable is a name of memory location. It is used to store data. Variables are changeable, we can change value of a variable during execution of a program. . It can be reused many times.
Note: Variable are nothing but identifiers.
Rules to write variable names:
i. A variable name contains maximum of 30 characters/ Variable name must be upto 8 characters.
ii. A variable name includes alphabets and numbers, but it must start with an alphabet.
iii. It cannot accept any special characters, blank spaces except under score( _ ).
iv. It should not be a reserved word.