dw-strings-functions-isnumeric.adoc

isNumeric

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isNumeric(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 2.2.0. Supported by Mule 4.2 and later.

Parameters

Name	Description
text	The input string.

Example

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

Source

%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")
}

Output

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

isNumeric(Null): Boolean

Helper function for isNumeric so it works with null value.