Apex Variable Declaration – Apex Data Types List.
In our last Salesforce Developer Tutorial we have learned about Apex Basics and Apex language building blocks. In this Salesforce Apex Tutorial we are going to learn about apex variables, Apex Variable declaration, Apex Data types.
Apex variables and Variable Declaration.
As already we discussed about Apex language that is a strongly typed language so we have to declare all variable before they are referenced in Apex coding. As general when we declare variables we have to declare data type followed by variable name.
Example :- Integer i; (Integer = Data Type, i = variable name).
- We should not declare variable name with symbols, numeric values.
- Variable names should not contained with underscore(_) extension.
- We should not use apex reserve words.
- We can use both lower case and upper case letters since they are not case sensitive.
Apex Data Types list.
| Data Type | Valid Values |
| String | Zero and Unicode characters |
| Boolean | True / False |
| Date | Date |
| DateTime | Date & Time |
| Time | Time |
| Integer | -2,147,483,648 to 2,147483,647 |
| Long | -263 to 263-1 |
| Decimal | signed number |
| Double | -263 to 263-1 |
| Blob | binary data value. |
| ID | 18 characters |
| Object | —– |