Different ways of using variables in DataWeave

1. Variables in DataWeave

2. Introduction
• Data items that can take more than one value during runtime
• Can define in DataWeave header or body
• Can also reference variables defined in Mule flow

3. Scope of Variables
• Defined in header – global scope
• Defined in body – limited scope

4. Initialization of Variables
• Literal expressions
• Variable reference expressions
• Functional expressions

5. Variables Defined in Header
 Can reference anywhere in code
 Use %var directive
 e.g. %var discount=0.05


6. Variables Defined in Body
 Can reference in the part of code where it is defined
 Use using operator
 e.g. using (discount = 0.05)


7. Reference Flow Variables
• Can reference flow variables defined before DataWeave component
• Use flowVars to reference
• e.g. flowVars.discount

8. Thank You