CODEWITHSUNDEEP
scheme
user7054784
user7054784

Reputation: 51

Nested lambdas with parameters

The result of the following expression is 39,how the numbers 7 and 4 are mapped to a and b,because I understand that b is 7 and and a is 4 and I get 27 as a result but the result is 39

        (((lambda [a] (lambda [b] (+ (* 5 a) b))) 7) 4)

Upvotes: 0

Views: 52

Answers (1)

user7487664
user7487664

Reputation: 24

Here is how it reduces

(((lambda [a] (lambda [b] (+ (* 5 a) b))) 7) 4)
((lambda [b] (+ (* 5 7) b)) 4)
(+ (* 5 7) 4)
39

the first redex is ((lambda [a] ...) 7) so a is bound to 7

the second redex to be reduced is ((lambda [b] ...) 4) so b is bound to 4

Upvotes: 1

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