Question

Discuss how you would determine a data type for your program variables. Give an example of each data type declaration in your program.

Answer 1

A variable is simply a name of storage location

The data type of a variable determines the kind of data the variable can hold.

commonly used data types : byte,short,int ,long,float,double,char,boolean.

In some programming languages like c,c++, Java

a variable declaration always contains two components: the type of the variable and its name.

Example: int count = 0; here int is data type & count is name of variable.

In some programming languages like java script we omit data type.

A variable in JavaScript can contain any data. A variable can at one moment be a string and at another be a number.

// no error
let message = "hello";
message = 123456;

// Screenshot of the code & output