Apex - Primitive Data types

Apex - Primitive Data types

• Integer
• Decimal
• Double
• Long
• Date
• Datetime
• String
• ID
• Boolean

       1.      Integer

             → 32-bit number without include decimal point.

             → Ex:

       Integer intNumber = 70;

       system.debug('Value of intNumber variable -> '+ intnumber);

     

     2.      Decimal

           → A number that includes a decimal point.

           → Decimal is an arbitrary precision number.

           → Currency fields are automatically assigned the type Decimal.

        

     3.      Double

           → 64 - bit number that includes a decimal point.

           → Doubles have a minimum value of -2⁶³ and a maximum value of 2⁶³-1

           → Ex:

        double pi = 3.14159;

        system.debug('Value of pi variable -> '+ pi);

     4.      Long

           → 64 - bit number that does not include a decimal point.

           → Longs have a minimum value of -2⁶³ and a maximum value of 2⁶³-1.

           → Use this data type when you need a range of values wider than the range provided by Integer.

           → Ex:

        Long ln = 214748985683648L;

        system.debug('Value of long variable -> '+ ln);

      5.      Date

           → A value that indicates a particular day.

           → Date values not contain information about time.

           → Date values must always be created with a system static method.

           → Ex:

        Date dtDate = date.today();

        System.debug('Today Date -> '+dtDate);

     6.      Datetime

           → A value that indicates a particular day and time, such as a timestamp.

           → Datetime values must always be created with a system static method.

     7.      String

           → Set of meaningful characters surrounded by single quotes.

           → It does not have limit on the number of characters they can include.

           → Instead, the heap size limit is used to ensure that your Apex programs don't grow too large.

           → Strings can be manipulated with several standard methods.

           → Ex:

         String specialStr = 'The quick brown fox jumped over the lazy dog.';

         System.debug('Special string -> ' + specialStr);

     8.      ID

           → Any valid 18-character Force.com record identifier.

           → If you set ID to a 15-character value, Apex converts the value to its 18-character representation.

           → Ex:

           ID id='00300000003T2PGAA0';

     9.      Boolean

           → A value that can only be assigned true, false, or null.

           → This type of variables can be used as flag in programming to identify the particular condition set or not set.

           → Ex:

           Boolean youCan = true;