AP CS: A Unit 1.1

Algorithm

Define step by step processes to follow when completing a task or solving a problem.

Sequencing

Defines an order for when steps in an algorithm are completed

Java

Very popular coding language, used in most apps and programs.

Class

Groups data and actions

Compiler

Translates the code written in java into a language the computer can understand.

IDE: Integrated Development Environment

A tool programmers use to develop their programs.

Bug

An error in the code.

Debugging

Finding and fixing errors.

Syntax

The rules that define how code is written so the computer can understand it.

Syntax

A mistake in the program where the rules of the programming language are not followed.

Logic Error

An error that causes the program to run incorrectly or behave unexpectedly

Run-Time Error

An error that occurs when the program is executed

Exception

A type of run-time error caused by an unexpected issue the compiler didn’t catch.

Variable

A storage location for a value

Data type specifications

The type of information stored, and what can be done to that information

Primitive

Most basic data type in Java and represents the simplest building blocks of data.

Primitive data Types

int, double, boolean, char

int

integer

double

Decimal

boolean

true/false

char

character (single, and must be in single quotes)

Declaring a variable

Declare the data type then name it

Naming guidlines

Starts with a letter/symbol/space, describes the value they store, written in lowerCamelCase

Initializing a variable

Assigning the variable a value. using an = sign.

Updating a variable

Assigning the variable a new value done the same way as initializing.

Finalizing a variable

Final in front of the variable, and prevents it from being changed.

String

An ordered sequence of characters in double quotes

Object

has a reference data type, and is created by a class