So in browsing custom functions to format numbers and/or currency, I was a bit stunned to stumble upon that fact the filemaker has a native function to insert commas where I'd have least expected it- NumToJtext. The functions description is converts roman numbers in number to japanese text. The format is: NumToJText(number;separator;characterType).
The functions I see this using NumToJText select '0' for type which corresponds to "half width (Hankaku) number". I googled this, but I'm still unsure- Will using this function just to insert commas (ie 30000000 to 3,000,000) have any unintended side effects?