Converts a number to a string with specified formatting.
format(number[,options])
Menu Location
- Press 2nd MATH to enter the MATH popup menu.
- Press D to enter the Strings submenu.
- Press 9 to select format(.
This command works on all calculators.
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NOTE: Due to the limitations of the wiki markup language, the E command on this page does not appear as it would on the calculator. See Wiki Markup Limitations for more information.
The format() command is a more advanced version of string() specifically intended to convert numbers (usually, floating-point numbers) to strings. It can override settings like Display Digits and Exponential Format, and instead lets the user input these options and more in a string. Since it converts even integer input to floating-point, it also doesn't depend on the Base setting.
The format string can have the following values (not case-sensitive):
- F[number] overrides Display Digits to fixed-point with [number] digits after the decimal; [number] can be omitted to use the default, which is 12; it must be between 0 and 12.
- S[number] does this and also overrides Exponential Format to scientific.
- E[number] does this and also overrides Exponential Format to engineering.
- G[number][character] does this and also separates the digits to the left of the decimal into groups of three, with [character] as the separator. The default for [character], if it is omitted, is a comma. If you make the separator a period, then the decimal point will become a comma.
To all of these, you can also append R[character] to replace the decimal point with [character]. Only 'symbols' are allowed for [character], which is a bit vague: numbers and letters are not allowed, nor are some international characters.
:format(π,"F")
"3.14159265359"
:format(2^25,"S6")
"3.355443e7"
:format(2^25,"E6")
"33.55443e6"
:format(2^25,"G0")
"33,554,432."
:format(2^25,"G0 R ")
"33 554 432 "
If the format string is empty, or if the argument is omitted entirely, format() will convert the number to a decimal, but otherwise will work just like string()
Error Conditions
260 - Domain error happens when the format string is improperly formatted.
