isNumeric(text: String): Boolean

Checks if the text contains only Unicode digits.

A decimal point is not a Unicode digit and returns false. Note that the method does not allow for a leading sign, either positive or negative.

Introduced in DataWeave version 2.2.0.


Name Description


The input string.


This example shows how isNumeric behaves with different inputs and sizes.


%dw 2.0
import isNumeric from dw::core::Strings
output application/json
  "a": isNumeric(null),
  "b": isNumeric(""),
  "c": isNumeric("  "),
  "d": isNumeric("123"),
  "e": isNumeric("१२३"),
  "f": isNumeric("12 3"),
  "g": isNumeric("ab2c"),
  "h": isNumeric("12-3"),
  "i": isNumeric("12.3"),
  "j": isNumeric("-123"),
  "k": isNumeric("+123")


  "a": false,
  "b": false,
  "c": false,
  "d": true,
  "e": true,
  "f": false,
  "g": false,
  "h": false,
  "i": false,
  "j": false,
  "k": false

isNumeric(text: Null): Boolean

Helper function that enables isNumeric to work with a null value.

Introduced in DataWeave version 2.2.0.

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