> For the complete documentation index, see [llms.txt](https://docs.cloud.hoverfly.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.cloud.hoverfly.io/create-simulations/using-templating-in-simulations/arithmetic-operations.md). # Arithmetic operations Note that these functions can be embedded into other functions. That means they will return the result, either directly into the template for rendering as part of the response, or if they are enclosed in another function, then the result will be returned into that function. ### Addition ```handlebars {{ add }} ``` example: ```handlebars {{ add this.cost this.markup '0.00' }} ``` ### ### Subtraction ```handlebars {{ subtract }} ``` example: ```handlebars {{ subtract this.fullprice this.discount '0.00' }} ``` ### ### Multiplication ```handlebars {{ multiply }} ``` example: ```handlebars {{ multiply this.quantity this.price '0.00' }} ``` ### ### Division ```handlebars {{ divide }} ``` example: ```handlebars {{ divide this.discount '10' '0.00'}} ``` ### ### Summing Arrays You can also sum an array of numbers using the following function: ```handlebars {{ sum }} ``` example 1: ```handlebars {{ sum (split (Request.Body 'jsonpath' '$.price[*]') ' ') '0.00' }} ``` example 2: ```handlebars {{ sum myArrayOfNumbers '0.00' }} ``` --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## 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, and the optional `goal` query parameter: ``` GET https://docs.cloud.hoverfly.io/create-simulations/using-templating-in-simulations/arithmetic-operations.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. 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.