'Operator exp env' presentation slideshows

6.037 Lecture 7B

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Read - Eval - Print Loop

Read - Eval - Print Loop. ( define (driver-loop) (prompt-for-input input-prompt) (let ((input (read) )) (let ((output (eval input the-global-env) )) (announce-output output-prompt) (user-print output))) (driver-loop)). ( define (prompt-for-input string)

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