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(rtos number [mode [precision]])

Convert that real number to a string.

This function converts a real number to a string. The argument number is the real number you want to convert.

Mode and precision arguments are optional arguments. The mode (1 through 5) selects the format of the string:

Mode Meaning
1 Scientific
2 Decimal
3 Engineering
4 Architectural
5 Fractional

The precision argument allows you to select the number of places after the decimal point. The range is 0 to 8.


Code Returns Format
(rtos 15.35 1 4) "1.5350E+001" Scientific.
(rtos 15.35 2 4) "15.3500" Decimal.
(rtos 15.35 3 4) "1'-3.3500" Engineering.
(rtos 15.35 4 4) "1'-3 1/4" Architectural.
(rtos 15.35 5 4) "15 3/8" Fractional.

NOTE  When you leave them out, the mode and precision arguments read the settings of system variables LUNITS (default = decimal units) and LUPREC (default = 4 decimal places). Thus, to automatically use the current system settings, simply leave out mode and precision.

(atof string)

(atoi string)

LISP Compatibility

Programming Overview of LISP (LISt Processing) Language

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