# format ### Description `format` takes a string and replaces all placeholders with values provided for them. ### Example: Formatting a Person Name ``` p is Person "{name} {surname}".format(name: p.first_name, surname: p.last_name) ``` It is common practice to have two separate[ information fields](/guides/glossary/information.md) for a name - one for the first and one for the last name. If, once these data are collected, you want to treat the full name as one combined piece of information, you could use `format` like in the example above which returns a name like "Bruce Wayne". ### Example: For an E-Mail The format operator is also very useful if you want to insert collected information into a larger string, e.g. an email. Let's say you would like to inform a client called "Clark Kent" about three new messages, then you could use the format operator like this: ``` p is Person "Dear {name} {surname} You have {new_messages} new messages." .format( name: p.first_name, surname: p.last_name, new_messages: p.nr_of_new_messages ) ``` This would return the following message: > Dear Clark Kent\ > You have 3 new messages. --- # 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://docs.atfinity.io/rule-language/operators/string-operators/format.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.