number

number

A number may be an int, a fraction, or a float.
int values share some methods with other numbers, but also have their own.

predicates

(num? x) -> returns true if x is a number

(int? x) -> returns true if x is an integer

(nint? x) -> returns true if x is a number, but not an integer

(num? 1) -> true
(num? 1/2) -> true
(num? 2.3) -> true
    
(int? 1) -> true
(int? 2/1) -> true
(int? 2.0) -> true
(int? 1/2) -> false
(int? 2.3) -> false
    
(nint? 1) -> false
(nint? 1/2) -> true
(nint? 2.3) -> true

messages

x.type -> number

x.zero? -> returns true if x is 0, false otherwise.

x.pos? -> returns true if x is > 0, false otherwise.

x.neg? -> returns true if x is < 0, false otherwise.

x.abs -> returns the absolute value of x.

x.to-bool -> returns false if x is 0, true otherwise.

x.to-text -> returns a textual version of the number.

x.floor -> closest int less than x

x.ceil -> closest int greater than x

x.round -> round x to the nearest int

x.truncate -> closest int closer to 0 than x

int messages

x.type -> int

x.inc -> x + 1

x.dec -> x - 1

x.even? -> true if x is even, false if odd

x.odd? -> true if x is odd, false if even