Next: 1+, Previous: -, Up: Numbers Dictionary
/ number ⇒ reciprocal
/ numerator &rest denominators^+ ⇒ quotient
number, denominator—a non-zero number.
numerator, quotient, reciprocal—a number.
The function / performs division or reciprocation.
If no denominators are supplied, the function / returns the reciprocal of number.
If at least one denominator is supplied, the function / divides the numerator by all of the denominators and returns the resulting quotient.
If each argument is either an integer or a ratio, and the result is not an integer, then it is a ratio.
The function / performs necessary type conversions.
If any argument is a float then the rules of floating-point contagion apply; see Floating-point Computations.
(/ 12 4) ⇒ 3 (/ 13 4) ⇒ 13/4 (/ -8) ⇒ -1/8 (/ 3 4 5) ⇒ 3/20 (/ 0.5) ⇒ 2.0 (/ 20 5) ⇒ 4 (/ 5 20) ⇒ 1/4 (/ 60 -2 3 5.0) ⇒ -2.0 (/ 2 #c(2 2)) ⇒ #C(1/2 -1/2)
The consequences are unspecified if any argument other than the first is zero. If there is only one argument, the consequences are unspecified if it is zero.
Might signal type-error if some argument is not a number. Might signal division-by-zero if division by zero is attempted. Might signal arithmetic-error.
floor , ceiling, truncate, round