Salesforce Apex Tutorial – Chapter 5: Apex Variables
A variable is a named value holder in memory. An apex variable is defined as a combination of the data type, identifier, and an optional Initializer. The identifier is the name chosen for a variable. The identifier should start with an alphabet or an underscore and it can be of any length.
You can read the previous article Salesforce Apex Tutorial – Chapter 4: Data Types In Apex and previous one Salesforce Apex Tutorial – Chapter 6: Apex Strings.
The declaration of variables in Apex is quite similar to java. Following is the syntax to declare an apex variable:
type identifier = value;
Below are a few examples of apex variables.
| String name = ‘Test’; // String variable declarationBoolean boolValue = True; // Boolean variable declarationInteger intValue= 10; // Integer variable declarationDecimal i = 2.5; //decimal variable declaration |
Following are the features of apex variables:
- Apex variables can be defined at any point in the code block.
- Apex variables are case insensitive.
- Apex variables are initialized to null if no other value is assigned to the apex variable during declaration.
- A variable defined in a method has scope within the method only.
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