How to concatenate two strings in Mule?

Step 1:

Add the transform Message Component in the mule flow from component palette.

Step 2: 

 In this component we can write the Dataweave script to concatenate two strings as shown below. We can click on Preview button to see the resultant of Dataweave operation.

Note: ++ is the concatenate operator to concatenate two strings.

Dataweave Expression:

%dw2.0

outputapplication/json

varfirstName= “Sumit”

varlastName= “Aggarwal”

—

firstName++lastName

Output:  “SumitAggarwal”

Reference Link: https://docs.mulesoft.com/mule-runtime/4.3/