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Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 40 |
1 files changed, 37 insertions, 3 deletions
@@ -10888,9 +10888,6 @@ a one-element sequence containing nil. The nullify function reduces all empty sequences to nil, thereby correcting the behavior of code which traverses sequences using cdr, and tests for termination with nil. -.TP - - .SH MATH LIBRARY .SS Arithmetic functions +, - @@ -11413,6 +11410,43 @@ the function flo-int. If <value> is a floating-point number, then it is converted by toint as if by the function int-flo. +.SS Variables *flo-min*, *flo-max* and *flo-epsilon* + +.TP +Description: + +These variables hold, respectively: the smallest positive floating-point +value; the largest positive floating-point value; and the difference +between 1.0 and the smallest representable value greater than 1.0. + +The *flo-min* and *flo-max* define the floating-point range, which consists +of five regions: values from (- *flo-max*) to (- *flo-min*); the value +0.0, and values from *flo-min* to *flo-max*. + +.SS Variable *flo-dig* + +This variable holds an integer representing the number of decimal digits +in a decimal floating-point number such that this number can be converted +to a TXR floating-point number, and back to decimal, without a change in any of +the digits. This holds regardless of the value of the number, provided that it +does not exceed the floating-point range. + +.TP +Description: + +These variables hold, respectively: the smallest positive floating-point +value; the largest positive floating-point value; and the difference +between 1.0 and the smallest representable value greater than 1.0. + +.SS Variables *pi* and *e* + +.TP +Description: + +These variables hold an approximation of the mathematical constants pi and e. +To four digits of precision, pi is 3.142 and e is 2.718. The *pi* and *e* +approximations are accurate to *flo-dig* decimal digits. + .SH BIT OPERATIONS In TXR Lisp, similarly to Common Lisp, bit operations on integers are based |