Java Online Training In Andhra Pradesh and Telangana
Opening Hours :7AM to 9PM
Variable is an identifier whose value can be changed. or which store the data Example:
Variable declaration rules:
1.Variable name must be starts with alphabet or underscore or dollar symbol. Example:
2.The max length of the Variable name is upto 32 characters.
3.If Variable name contains more than one word ,the second word onwards first letter should be uppercase letter. Example:
4.No spaces are allowed at the middle of the Variable declaration. Example:
int student Age=10; (Invalid);
5.If Variable value contains constant value that Variable name must be uppercase letter. Example:
final float PI=3.14;
6.If constant Variable name contains more than one word ,it should be separated with underscore. Example:
final float PI_VALUE=3.14;
7.All keywords are lower case letters. Example:
8.We should not take keyword as a Variable name. Example:
int if=10;(Invalid) int If=10;(Valid)
Variable Defination types:
It Means initialize the some value to the Variable. Example:
Here 10 is initialize to the x.
In the declaration no value initialize to the Variable. Example:
In the assignment assign the value to the Variable or assign Variable to the Variable. Example:
x=10;(It is a value to Variable).