Apex Primitive Data Types | Salesforce Development | Integer, Long, Double, Decimal, Blob, id etc.

                  In this post, we will see Apex Primitive Data Types | Salesforce Development | Integer, Long, Double, Decimal, Blob, id etc. 

Primitive Data Types in Apex

Primitive Data Types:

        Basic Data Types which can not be defined in terms of other data types.

 

Derived/Structured Data Types:

        Data Types which can be defined in terms of other data types.

e.g. class

 

Syntax:

Data_Type Variable = Literal;

e.g. Integer x = 3;

 

S.N.	Data Type	Description
1.	integer	·     Used to save integer values ·     Variable occupies 32 bit memory ·     Range -231 to 231-1
2.	long	·     Used to save integer values ·     Variable occupies 64 bit memory ·     Range -263 to 263-1
3.	double	·     Used to save decimal point values e.g. 3.2 ·     Variable occupies 64 bit memory ·     Range -263 to 263-1
4.	decimal	·     Used to save decimal point values e.g. 3.2 ·     Decimals have no bounds and can grow to any size
5.	string	·     Used to save string value e.g. ‘Hello World’ ·     Value should be enclosed in single quote e.g. ‘Parag Jambhulkar’
6.	boolean	·     Used to save boolean values i.e. true or false
7.	date	·     Used to save date
8.	time	·     Used to save time
9.	datetime	·     Used to save date and time
10.	blob	·     Saves binary data ·     Used to save any image, audio or multimedia file
11.	id	·     Used to save Salesforce record id, object id or any kind of metadata id ·     It can be of 15 digits or 18 digits ·     15 digit is case sensitive id ·     18 digit is case insensitive id ·     If you allocate 15 digit id then it get automatically converted to 18 digit id

 

Note: If you are not assigning any value to variable, then by default its value is set to null.

 

Program Code (Class DataTypes):

public class DataTypes {

    public integer a=3;

    public Long b=5L;

    public double c=3.2;

    public decimal d=5.7;

    public string e='Parag Jambhulkar';

    public boolean f=true;

    //public date dd=Date.newInstance(year, month, day)

    public date g=Date.newInstance(2022, 12, 26);

    //public time hh=Time.newInstance(hour, minute, second, millisecond)

    public time h=Time.newInstance(06, 30, 32, 5);

    //public datetime ii= Datetime.newInstance(date, time)

    public datetime i=DateTime.newInstanceGmt(g, h);

    public blob j=blob.valueOf('paragjam');

    public id k='0D5B000001DVM9t';

    

    public void show()

    {

       system.debug('integer value:'+a); 

       system.debug('long value:'+b);

       system.debug('double value:'+c);  

       system.debug('decimal value:'+d); 

       system.debug('string value:'+e);

       system.debug('boolean value:'+f); 

       system.debug('date value:'+g); 

       system.debug('time value:'+h); 

       system.debug('datetime value:'+i); 

       system.debug('blob value:'+j); 

       system.debug('id value:'+k);

    }

}

Program Code: (Anonymous Window)

DataTypes obj=new DataTypes();

obj.show();