The name of the new function should reflect the function's purpose, making it easier to recognize when it appears in the Formula Editor's Functions list. For example, a function named "Picture" could let you specify a template picture of how data should appear in the report. If a field contains phone numbers, you can use the Picture function to specify that the data appear like this:
A resulting value from the phone number field would appear as follows:
Function names must start with a letter, while all remaining characters in the name can be letters or numbers. The name can be up to 254 characters long, and it must be unique. That is, you cannot give a function a name that has been used for another Formula Editor function or UFL function, nor can it have a name that matches a standard C keyword (such as if, return, switch, or while).
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