Merge pull request #196625 from microsoft-dustin/isint-template-function

New isInt() template expression function

Author: PRMerger18

articles/logic-apps/workflow-definition-language-functions-reference.md

@@ -98,6 +98,7 @@ To work with strings, you can use these string functions and also some [collecti
 | [formatNumber](../logic-apps/workflow-definition-language-functions-reference.md#formatNumber) | Return a number as a string based on the specified format |
 | [guid](../logic-apps/workflow-definition-language-functions-reference.md#guid) | Generate a globally unique identifier (GUID) as a string. |
 | [indexOf](../logic-apps/workflow-definition-language-functions-reference.md#indexof) | Return the starting position for a substring. |
+| [isInt](../logic-apps/workflow-definition-language-functions-reference.md#isInt) | Return a boolean indicating whether the string is an integer. |
 | [lastIndexOf](../logic-apps/workflow-definition-language-functions-reference.md#lastindexof) | Return the starting position for the last occurrence of a substring. |
 | [length](../logic-apps/workflow-definition-language-functions-reference.md#length) | Return the number of items in a string or array. |
 | [nthIndexOf](../logic-apps/workflow-definition-language-functions-reference.md#nthIndexOf) | Return the starting position or index value where the *n*th occurrence of a substring appears in a string. |
@@ -2538,6 +2539,35 @@ int('10')
 
 And returns this result: `10`
 
+<a name="isInt"></a>
+
+### isInt
+
+Return a boolean indicating whether the string is an integer.
+
+```
+isInt('<string>')
+```
+
+| Parameter | Required | Type | Description |
+| --------- | -------- | ---- | ----------- |
+| <*string*> | Yes | String | The string to examine |
+|||||
+
+| Return value | Type | Description |
+| ------------ | ---- | ----------- |
+| <*boolean-result*> | Boolean | A boolean indicating whether the string is an integer |
+
+*Example*
+
+This example tests a string that represents an integer:
+
+```
+isInt('10')
+```
+
+And returns this result: `true`
+
 <a name="item"></a>
 
 ### item
@@ -5320,4 +5350,4 @@ Here's the result: `Paris`
 
 ## Next steps
 
-Learn about the [Workflow Definition Language](../logic-apps/logic-apps-workflow-definition-language.md)
+Learn about the [Workflow Definition Language](../logic-apps/logic-apps-workflow-definition-language.md)