How do I use Apex variable in Visualforce page?

How do I use Apex variable in Visualforce page?

A local variable that can be used as a replacement for a specified expression within the body of the component. Use to reduce repetitive and verbose expressions within a page. Use this component to get user input for a controller method that does not correspond to a field on an sObject.

What is a variable apex?

An Apex variable is valid from the point where it is declared in code. So it is not allowed to redefine the same variable again and in code block. Also, if you declare any variable in a method, then that variable scope will be limited to that particular method only.

How do I use global variables in Visualforce page?

Use global variables to reference general information about the current user and your organization on a page. Global variables must be referenced using Visualforce expression syntax to be evaluated, for example, {!$ User. FirstName} .

How do you declare a variable in Apex class?

To declare a variable, specify the following:

1. Optional: Modifiers, such as public or final , as well as static .
2. Required: The data type of the variable, such as String or Boolean.
3. Required: The name of the variable.
4. Optional: The value of the variable.

How do I get the current page ID in a VF page?

currentpage(). getparameters(). get(‘id’) can be used to get current record id or other url parameters in apex code. Many times we have requirement to get current record id or url parameters of visualforce page in apex code.

How do you declare an integer variable in Apex class?

How do you declare a global variable in Apex class?

Global variables in Apex Class

1. public class PurchasedProducts {
2. List c;
3. public List getPurchasedProducts() {
4. if(c == null) c = [select id, name from contact WHERE FirstName =:User.FirstName];
5. return c;
6. }
7. }

How do I view global variables in Salesforce?

These are used to access and display the user and organization information, perform standard actions on records such as creation, deletion etc. These are easily identified as they start with the ‘$’ sign. Any fields of the global variables can be accessed by using the expression in the form of {! $GlobalName.

How do you declare a method in Apex?

To define a method, specify the following:

1. Optional: Modifiers, such as public or protected .
2. Required: The data type of the value returned by the method, such as String or Integer.
3. Required: A list of input parameters for the method, separated by commas, each preceded by its data type, and enclosed in parentheses () .