Variables and Data types in Java Script

Variable:

Variable is nothing which can hold a value.Variables in Java Script can be of type:

1)Number->It can be a integer or real numbers both are just numbers.–>12,12.345

2)String–>”abc”

3)boolean–>true or false

4)Null–>null.

Conditions to specify variable:

–>Variable name starts with lower case letters or upper case letters or Underscore.

–>Variable name should not start with a number.

–>variable name case-sensitive.

–>Length of the variable name is not limited.

Variable name is called “Identifier”

–>we can declare the variables any where.

Declaring the variable:

var variablename=value

Example to know about Variables.

Output: