Define Constant and Variable

Question

Define constant and variable.

Answer 1

A variable is a meaningful name which is given to a data storage location in the computer memory which contains a value. Each variable that is associated with the data type finds out what type of value can be stored in variable, for example:, a decimal such as 30.05, an integer, like 100 or a character, such as 'A'.

Variables can be declared by using the following syntax:

<Data_type> <variable_name> ;

A constant is same as the variable except that the value, which is assigned to the constant, cannot be changed, as in the case of a variable. Constants should be initialized at the time of declaration.

Constants can be declared by using the following syntax:

const int interestRate = 10;