4.1 Booleans

True and false are represented by the values #t and #f, respectively, though operations that depend a boolean value typically treat anything other than #f as true.

See also: and, or, andmap, ormap.

(boolean? v) → boolean?

v : any/c

Returns #t if v is #t or #f, #f otherwise.

(equal? v1 v2) → boolean?

v1 : any/c

v2 : any/c

Two values are equal? if and only if they are eqv?, unless otherwise specified for a particular datatype.

Datatypes with further specification of equal? include strings, byte strings, numbers, pairs, vectors, and hash tables.

(eqv? v1 v2) → boolean?

v1 : any/c

v2 : any/c

Two values are eqv? if and only if they are eq?, unless otherwise specified for a particular datatype.

The number and character datatypes are the only ones for which eqv? differs from eq?.

(eq? v1 v2) → boolean?

v1 : any/c

v2 : any/c

Return #t if v1 and v2 refer to the same object, #f otherwise. See also Object Identity and Comparisons.