Unit 1 Key Words Flashcards
Indentation
A style that helps to show the codes structure.
Pseudocode
An informal English-like outline of an algorithm which can be converted to the programming language.
Programming Paradigms
Standard guidelines and conventions (most people) used to develop and build computer codes and solve problems.
Identifier
A value stored in the computers RAM. It is a way of accessing data for the programmer.
Constants
Type of identifier that represents a value that will not change while a program is running.
Variables
Type of identifier that represents a value that may change.
Local Variables
Used within a block of code in which they are declared.
Global Variables
Can be used anywhere in the program code.
Operators (including mathematical, relational, boolean)
Special symbols which tell the program to perform specific tasks on it’s data. It has to be used in a specific order.
Mathmatical: Add, Subtract, Multiply and divide.
Relational: Defining relationship between two different values.
Boolean: Combines expressions together.
Built In Functions
Functions that can be used to solve complex problems.
An example are formatting it’s appearance. Can also download from third party websites.
Arithmetic Functions
Perform mathematical operations.
String Handling Functions
Helps to perform IT Operations on strings.
General Functions
Allows to input data and output messaegs.
Validation
A process that checks to see if an input value makes sense before it is processed.
Run Time Error
A problem that occurs when an application is being used. This results in the application locking/crashing.
Range Check
This assess whether data is entered within a valid minimum to maximum range.
Length Check
This asseses how many characters have been entered.
Presence Check
Whether data exists or is present. Not left blank,
Type Check
Asseses wheather data entered is of the correct data type. For example, age would need to be an integer.
Format Check
Assess whether the data entered is in the correct format. For example, a postcode has two words, both three letters.
Check Digit
A single character, obtained from an algorithm which is performed on a piece of data.
Procedural Programming
Are written as a series of well defined steps which solve a set problem.
Object Oriented
Objects are created from classes, which are modelled on real world things such as customers, bank accounts, products etc. Each class acts as a software blueprint that contains the thing’s state (data properties) and behaviour (methods or functions) in program code.
Polymorphism
Allows the programmer to use one named function to perform a set task but alter it’s behaviour depending on it’s use.
