Flow - Variables

Variable: 

Data Type	Use to store...
Text	IDs, descriptions, and other text or long text data.
Record	Field values from a record, such as an opportunity. When this data type is selected, you create a record variable.
Number	A numeric value.
Currency	A currency value.
Boolean	A yes/no value, such as whether a checkbox was selected.
Date	A date value.
Date/Time	A date and time value.
Picklist	A picklist value.
Multi-Select Picklist	Picklist values, separated by semicolons.
Apex-Defined	Field values from an Apex class. When this data type is selected, you create an Apex-defined variable.

We can Store single values or collection values.

Screen Components

 Screen components are available in three categories.

• Input includes standard components that request information from the user.
• Display includes standard components that display information to the user.
• Custom includes components that you or someone else have created. Install them from AppExchange or a third-party library, or work with a developer to build your own.

Action Types

Without creating or configuring anything else in Salesforce, you can use these actions.

• Post to Chatter.
• Send Email.
• Submit For Approval.
• Activate or Deactivate a Permission Set.
• Global or object-specific actions provided by Salesforce.

You can also include actions you create with clicks.

• Other flows in your org are available in the Subflow element.
• Custom global or object-specific actions are available in the Action element.

You can also include actions that require code. And you can install custom actions from AppExchange or a third-party library.

• To do something in the Salesforce database, build or install an Apex action.
• To do something in the browser, build or install a local action.