DataWeave 2.2 is compatible and bundled with Mule 4.2. Standard Support for Mule 4.2 ended on May 2, 2021, and this version of Mule will reach its End of Life on May 2, 2023, when Extended Support ends.

Deployments of new applications to CloudHub that use this version of Mule are no longer allowed. Only in-place updates to applications are permitted.

MuleSoft recommends that you upgrade to the latest version of Mule 4 that is in Standard Support so that your applications run with the latest fixes and security enhancements.

charCodeAt(String, Number): Number

Returns the Unicode for a character at the specified index.

This function fails if the index is invalid.


Name Description


The input string.


The index (a Number type) of a character in the string (as a string array). Note that the index of the first character is 0.


This example returns Unicode for the "u" at index 1 in "MuleSoft".


%dw 2.0
import * from dw::core::Strings
output application/json
  "charCodeAt" : charCodeAt("MuleSoft", 1)


{ "charCodeAt": 117 }

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