# String Expressions String Expressions return a *\*, and each part of the expression is evaluated as a string. When editing an Expression of this type, you have available [Functions ](/kalipso5/developing/form/expressions/functions.md)and all the Kalipso objects from where you can retrieve values ([Global Variables](/kalipso5/developing/form/variables.md), [Controls ](/kalipso5/developing/form/controls.md)and [Local Variables](/kalipso5/developing/form/option-window/local-variables.md)). To use any of these items you just have to double-click it and it will be automatically added to the Expression. ### Examples: Consider that the value of Input "iProduct" is 1020393. * *Example 1* "Product with code <" + CTRL(iProduct) + "> not found!"\ **Result** = Product with code <1020393> not found! * *Example 2* "The result of 1 + 2 is " + "1" + "2" + "."\ **Result** = The result of 1 + 2 is 12 * *Example 3* "The result of 1 + 2 is " + NumToString(1 + 2) + "."\ **Result** = The result of 1 + 2 is 3 {% hint style="info" %} There are multiple ways to add ENTERs in string expressions, including inside the string itself. Check the next 3 example: Example1: **"123" + ENTER + "456"** Example2: **"123" + CR + LF + "456"** Example3: **"123** **456"** {% endhint %} --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://doc.sysdevmobile.com/kalipso5/developing/form/expressions/string-expressions.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.