PPT-1 Formal Semantics of Programming Languages

Program testing can be used to show the presence of bugs but never to show their absence Dijkstra 2 3 4 Semantics of programming languages Basic components to describe programming languages. . “Program testing can be used to show the presence of bugs, but never to show their absence!” --. Dijkstra. 2. . Semantics of programming languages. Basic components to describe programming languages. Robert Stewart. The most important property of a program is whether it accomplishes the intentions of its user.. Current method of verification. A better method is using an axiomatic basis for programs.. Dr. X. Semantics. There is no single widely acceptable notation or formalism for describing semantics. Several needs for a methodology and notation for semantics:. Programmers need to know what statements mean. Greg Morrisett. Goal. Understand how to build models of dynamic systems and . formally . reason about them.. Dynamic Systems. (Possibly infinite) set of states and a transition relation between states.. Software is made by programmers. Computers need all kinds of software, from operating systems to applications. People learn how to tell the computers what to do so that the computers do useful things . l. anguages . 1: Introduction . (. with a simple language). Isao Sasano. Department of . Information Science and . Engineering. . Schedule. 13 Lectures. , . Mid-term exam. , Final exam. Evaluation. Mid-term exam: M point / . Chapter Three. Modern Programming Languages, 2nd ed.. 1. Three “Equivalent” Grammars. Chapter Three. Modern Programming Languages, 2nd ed.. 2. G1. : <. subexp. > ::= . a. | . b. | . c. | <. Language using K. Grigore . Rosu. University of Illinois at Urbana-Champaign. Joint project . between . the FSL group at UIUC (USA) . and . the FMSE group at UAIC (Romania). http://k-framework.org. K Team. . “Program testing can be used to show the presence of bugs, but never to show their absence!” --. Dijkstra. 2. . 3. . 4. . Semantics of programming languages. Basic components to describe programming languages. Lecture . 9. Function-Closure Idioms. Zach Tatlock. Winter 2018. More idioms. We know the rule for lexical scope and function closures. Now what is it good for. A partial but wide-ranging list:. Pass functions with private data to iterators: Done. CS 170b. Benjamin Gaska, much help from William Mitchell. What is a programming language. A simple definition:. A system for describing computation.. It is generally agreed that in order for a language to be . Lecture 22. OOP . vs. Functional Decomposition; Adding Operators & Variants; . Double-Dispatch . Dan Grossman. Autumn . 2018. Breaking things down. In functional (and procedural) programming, break programs down into . Lecture . 22. OOP . vs. Functional Decomposition; Adding Operators & Variants; . Double-Dispatch . Dan Grossman. Winter 2013. Breaking things down. In functional (and procedural) programming, break programs down into . The Benefits of Reading Books,Most people read to read and the benefits of reading are surplus. But what are the benefits of reading. Keep reading to find out how reading will help you and may even add years to your life!.The Benefits of Reading Books,What are the benefits of reading you ask? Down below we have listed some of the most common benefits and ones that you will definitely enjoy along with the new adventures provided by the novel you choose to read.,Exercise the Brain by Reading .When you read, your brain gets a workout. You have to remember the various characters, settings, plots and retain that information throughout the book. Your brain is doing a lot of work and you don’t even realize it. Which makes it the perfect exercise!