CS135 Midterm: Term Test 1 - Fall 2017
28 Feb 2018
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Document Summary
Topic included: translating expression, functions and constants, design recipes, comparison, boolean, conditional expression, 3 the semantics of beginning student, structures and compound data, lists, natural numbers, recursion, more on lists. Imperative language: based on frequent changes to data. Functional language: based on the computation of new values rather than the transformation of old ones. Examples: excel formulas, lisp, ml, haskell, erlang, f#, mathematica, xslt, Racket: a functional programming language interactive evaluator: minimal but powerful syntax, small toolbox with ability to construct additional required tools, used in education and research since 1975, a dialect of scheme. #i prefix is short for i don"t really know the precise number so take that for now or inexact number. The expression (+ (1)(2)) contains way too many parentheses, and. Drracket lets you know in no uncertain terms: > (+ (1) (2)) function call:expected a function after the open parenthesis, found a number. 1. 2. 1 definition: f(x) = x2, g(x, y) = x + y.
