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let



    macro
    boot.janet on line 233, column 1

    (let bindings & body)

    Create a scope and bind values to symbols. Each pair in `bindings` 
    is assigned as if with `def`, and the body of the `let` form 
    returns the last value.

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(let [sweet "what does mine say?"]
 (let [dude sweet]
  (let [what-does-mine-say? dude]
   what-does-mine-say?))) # => "what does mine say?"

jgartePlayground

(let [a 1]
 (let [b a]
  b)) # => 1

jgartePlayground

(let [a 1 b 2 c 3] (+ a b c))  # => 6

(let
  [a 1
   b (+ a 1)
   c (+ b 1)]
  (+ a b c))  # => 6

cellularmitosisPlayground