Expression input: (+ 1 2 3) clear expression input on eval







1. Sum:

(+ 1 2 3) 2. Define a variable in the Global environment:

(define x 10) 3. Define a procedure:

(define (sum x y) (+ x y)) 4. Eval the sequence (block) of expressions:

(begin (define a 10) ; define "a" variable (define b 30) ; and "b" variable (define (square x) (* x x)) ; and a function (+ (square a) b)) ; and get the sum of square of "a" and "b" 5. Recursion; define the factorial function and call it:

(begin (define (factorial n) ; define the factorial function (if (= n 1) 1 (* n (factorial (- n 1))))) (factorial 5)) ; and call it for value 5 6. Map the list with a lambda expression:

(map (lambda (x) (* x x)) ; anonymous function (list 1 2 3 4)) ; maps the list to '(1 4 9 16) Examples (click to eval):1. Sum:2. Define a variable in the Global environment:3. Define a procedure:4. Eval the sequence (block) of expressions:5. Recursion; define the factorial function and call it:6. Map the list with a lambda expression:

Output: