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How to Think CS
Chapter 1
| Term | Definition |
|---|---|
| activecode | A unique interpreter environment that allows Python to be executed from within a web browser. |
| algorithm | A general step by step process for solving a problem. |
| bug | An error in a program. |
| byte code | An intermediate language between source code and object code. Many modern languages first compile source code into byte code and then interpret the byte code with a program called a virtual machine. |
| codelens | An interactive environment that allows the user to control the step by step execution of a Python program |
| comment | Information in a program that is meant for other programmers (or anyone reading the source code) and has no effect on the execution of the program. |
| compile | To translate a program written in a high-level language into a low-level language all at once, in preparation for later execution. |
| debugging | The process of finding and removing any of the three kinds of programming errors. exception |
| exception | Another name for a runtime error. |
| executable | Another name for object code that is ready to be run. |
| formal language | Any one of the languages that people have designed for specific purposes, such as representing mathematical ideas or computer programs; all programming languages are formal languages. |
| high-level language | A programming language like Python that is designed to be easy for humans to read and write. |
| interpret | To execute a program in a high-level language by translating it one line at a time. |
| low-level language | A programming language that is designed to be easy for a computer to execute; also called machine language or assembly language. |
| natural language | Any one of the languages that people speak that evolved organically. |
| object code | The output of the compiler after it translates the program. |
| parse | To examine a program and analyze the syntactic structure. |
| portability | A property of a program that can run on more than one kind of computer. |
| print function | A script that causes the Python interpreter to display a value on its output device. |
| problem solving | The process of formulating a problem, finding a solution, and expressing the solution. |
| program | A sequence of instructions that specifies to a computer actions and computations to be performed. |
| programming language | A formal notation for representing solutions. |
| Python shell | An interactive user interface to the Python interpreter. The user of a Python shell types commands at the prompt (>>>), and presses the return key to send these commands immediately to the interpreter for processing. |
| runtime error | An error that does not occur until the program has started to execute but that prevents the program from continuing. |
| semantic error | An error in a program that makes it do something other than what the programmer intended. |
| semantics | The meaning of a program. |
| shell mode | A style of using Python where we type expressions at the command prompt, and the results are shown immediately. |
| source code | A program, stored in a file, in a high-level language before being compiled or interpreted. |
| syntax | The structure of a program. |
| syntax error | An error in a program that makes it impossible to parse — and therefore impossible to interpret. |
| token | One of the basic elements of the syntactic structure of a program, analogous to a word in a natural language. |
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