The WebScript Language

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Variables

To declare a variable in WebScript, use the syntax:

id myVar;
id myVar1, myVar2;

In these declarations, id is a data type. The id type is a reference to any object-in reality, a pointer to the object's data (its instance variables). Like a C function or an array, an object is identified by its address; thus, all variables declared in WebScript are pointers to objects. In the examples above, myVar1 and myVar2 could be any object: a string, an array, or a custom object from your application.

Note: Unlike C, no pointer manipulation is allowed in WebScript.

Instead of using id, you can specifically refer to the class you want to instantiate using this syntax:

className *variableName;

For example, you could specify that a variable is an NSString object using this syntax:

NSString *myString1;

NSString *myString2, *myString3;

For more information on specifying class names in variable declarations, see the section "Data Types".

In WebScript, there are two basic kinds of variables: local variables and instance variables. You declare instance variables at the top of the file, and you declare local variables at the beginning of a method or at the beginning of a block construct (such as a while loop). The following shows where variables can be declared:

id instanceVariable; // An instance variable for this 
class.



- aMethod {

	id localVariable1; // A local variable for this method.



	while (1) {

		NSString *localVariable2; // A local variable for 
this block.

	}

}

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