Haskell int to double
[PDF File]CSCE 314 Programming Languages - Texas A&M University
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mult :: Int → (Int → (Int → Int)) mult x y z = x*y*z mult takes an integer x and returns a function mult x, which in turn takes an integer y and returns a function mult x y, which finally takes an integer z and returns the result x*y*z! Note:! • Functions returning functions: our first example of higher-order functions!
[PDF File]PROGRAMMING IN HASKELL
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In Haskell, a new name for an existing type can be defined using a type declaration. type String = [Char] String is a synonym for the type [Char]. 2 ... Expr ®Int size (Val n) = 1 size (Add x y) = size x + size y size (Mul x y) = size x + size y eval :: Expr ®Int
[PDF File]Haskell Tutorial
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•Int •Integer •Float •Double •Bool •Char let c = 'a' can be unlimited True or False Haskell –Basic Types A string is a list of chars ... Haskell –Function areaOfRect :: Int -> Int -> Int areaOfRect a b = a * b. Write a function Haskell –Function areaOfRect a b = a * b num2Text 1 = "one"
[PDF File]HVX: Disciplined Convex Programming and Symbolic Subdi ...
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Haskell type system, so the convexity of a user’s program is checked when the optimization routine is compiled rather than when it is run. This has two bene ts: rst, it eliminates ... (Int->Double)--Stepsizefunction.->Int--Numberofiterationstorun.-> Vars--Variablesandtheircurrentvalues.-> (Vars,Double ...
[PDF File]A general introduction to Functional Programming using Haskell
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Programming in Haskell G. Hutton Cambridge University Press, 2007. 3 First examples in Haskell • Key mechanism in FPL: function definition double x = x + x • Evaluation through function application: double 3 = { applying double } ... Int Integer – Integer represents integer numbers with arbitrary precision Float. 8
[PDF File]1 The number systems in Haskell 98
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and Rational in Haskell), but int, float and double from C are reborn in Haskell as well (only with capital initials: Int, Floatand Double). 1.0.3 Introduction Anyway, let us start all over again. Our goal is the stepwise (re)construction of figure 2. And we take off in the middle.
[PDF File]PROGRAMMING IN HASKELL
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Hugs is an implementation of Haskell 98, and is the most widely used Haskell system; ... quadruple x = double (double x) When developing a Haskell script, it is useful to keep two windows open, one running an editor for ... (Int,Int) Int add’ :: Int (Int Int) 14
[PDF File]IEEE VisWeek Tutorial 2008 Lexical Syntax ... - Haskell
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42 value of any number type: Int, Integer, Float, Double, etc 42.0 value of any fractional type: Float, Double, Rational, Complex 1.2e3 scientific notation (= 1.2 x 10^3) Equals symbols = single = is a definition of a value == double == is a comparison operator returning a Boolean Lambda notation
[PDF File]Data Types - Computer Science
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In Haskell. Type: Int. ... ‣ Double-precision, double the size. 8 logic — numbers — letters Thursday, March 25, 2010. UNC Chapel Hill Brandenburg — Spring 2010 10: Data Types COMP 524: Programming Language Concepts Primitive Types Representing money.
[PDF File]Richard A. Eisenberg Simon Peyton Jones
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Along with the unboxed primitive types (such as Int # and Double #), Haskell has support for unboxed tuples. A normal, boxed tuple—of type, say, (Int;Bool)—is represented by a heap-allocated vector of pointers to the elements of the tuple. Accordingly, all elements of a boxed tuple must also be boxed. Boxed tuples are also lazy,
[PDF File]HaPy Haskell for Python
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3.2 Haskell Types in Python One of the main challenges in HaPy is the repre-sentation of Haskell data types in Python. Some primitive Haskell types (currently Bool, Int, Double, and String) are marshalled into the equivalent Python type. All other Haskell types are returned as opaque references: they can be passed to Haskell functions, but ...
[PDF File]A Hybrid TM for Haskell - University of Rochester
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A Hybrid TM for Haskell Ryan Yates Michael L. Scott Computer Science Department, University of Rochester ... an account represented by a TVar holding an Int and a value to be added. The result of the deposit function is an ... ence it contains—does double duty as the lock. Initial reads spin on locked values. At commit time, validation is ...
[PDF File]Concepts of Programming Languages A Brief Intro to ...
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Haskell • Most widely used implementation-Glasgow Haskell Compiler (GHC)-Open source (BSD3)-available for most popular OSes (GNU/Linux, MacOS, Windows, Solaris, etc)-is both a highly optimising compiler as well as an interactive interpreter-implements many extensions to Haskell ‘98-comes with a extensive set of libraries (with many more at
[PDF File]Recursion and Induction: Haskell; Primitive Data Types ...
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Primitive Data Types • We make use of the following built-in Haskell data types: – integer (called Int) – boolean (called Bool) – character (called Char) – string (called String) • In the next few slides we discuss each of these types in turn Theory in Programming Practice, Plaxton, Spring 2005
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