|Parameters||val1, a value|
val2, another value
|Purpose||Determines if val1 and val2 are equal, even if they are complex structures. Compares individual elements in lists.. Particularly appropriate for lists, strings, and vectors.|
|Produces||A truth value: true (|
|Preconditions||Exactly two parameters (verified).|
> (equal? 2 2) #t > (equal? 2 2 2) equal?: expects 2 arguments, given 3: 2 2 2 > (equal? 2 (+ 1 1)) #t > (equal? "hello" "hello") #t > (equal? 'hello 'hello) #t > (equal? 'hello (car (list 'hello 'goodbye))) #t > (equal? null null) #t > (equal? (cons 'a null) (cons 'a null)) #t > (equal? 5.0 5) #f > (equal? 5.0 5.0) #t
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