AP CSP Unit 4 - Variables, Conditionals, & Functions

Expression

A combination of operators and values that evaluates to a single value.

Assignment Operator

Allows a program to change the value represented by a variable.

Variable

A named reference to a value that can be used repeatedly throughout a program.

Boolean Value

A data type that is either true or false.

Comparison Operators

Symbols used to evaluate a Boolean expression

Function

A named group of programming instructions. Also referred to as a "procedure".

Function Call

A command that executes the code within a function.

Arithmetic Operator

Part of most programming languages and include addition, subtraction, multiplication, division, and modulus operators.

Boolean Expression

An expression that evaluates to either true or false.

Concatenation

Joins together two or more strings end-to-end to make a new string.

Conditional Statement

Affect the sequential flow of control by executing different statements based on the value of a Boolean expression.

Logical operator

NOT, AND, and OR, which evaluate to a Boolean value.

Selection

Determines which parts of an algorithm are executed based on a condition being true or false.

String

An ordered sequence of characters.

Global Variable

A variable that can be used in any part of the program.

Local Variable

A variable that can only be accessed from a specific portion of a program.

Syntax Error

An error that results when an instruction does not follow the syntax rules or grammar of the programming language.

Logic Error

An error in a program that makes it do something other than what the programmer intended.