;; The first three lines of this file were inserted by DrRacket. They record metadata
;; about the language level of this file in a form that our tools can easily process.
#reader(lib "htdp-intermediate-lambda-reader.ss" "lang")((modname scope-let-let*-examples) (read-case-sensitive #t) (teachpacks ()) (htdp-settings #(#t constructor repeating-decimal #f #t none #f () #f)))

(define (foo x)
  (+ x b))

(define b 99)
(define a (sqrt b))

(cons b
      (let* {[a (* a b)]
             [b (* a b)]
             [c (* a b)]}
        (cons a (cons b (cons c '())))))

class Foo {
   int n;
       
   void helper() {
        print(n);
        int n = n+2;
        print(n);
   }
}

; Syntax of `let`:

#;(let { <binding>... }
  <expr>)

; syntax for `<binding>`:
;     [ <Id> <Expr> ]


; WHY doe we use variables?
;  (1) avoid repeated computations
;  (2) give meaningful names to sub-computations that will lead to my overall result



(cons b
      (let {[a 15]
            [b (+ 2 3)]
            [c (* a b)]}
        (cons a (cons b (cons c '())))))

(cons b
      (let {[a 15]
            [b (+ 2 3)]
            }
        (let {[c (* a b)]}
          (cons a (cons b (cons c '()))))))



(cons b
      (let {[a 15]
            [b (+ 2 3)]}
        (let {[c (* a b)]}
          (cons a (cons b (cons c '()))))))