1. Variable Declaration & Usage

Variable Declaration is a statement that provides the variable name and its type, allowing the program to allocate memory for storing values.

1. = sign is used to store the data to the variable. This statement gives the instruction to the CPU to store the data in the memory.

2. left part of the = is variable name

3. right part of the = is data

4. Left part of the = , ie variable name is used to read the data from the memory. This statement gives the instruction to the CPU to read the data from memory and return to the program

Variable Type	Data Type	Multiple data allowed?
Integer	Integer data only	No
String	Any data	No
Boolean	1 or 0 , true 0r false	No
Date	date	No
Array	Any data	Yes
Object	Any data	Yes