BJC Unit 2 Lab 1 and Lab 2 Vocabulary

variable

A container that can hold one value at a time

local variable

a variable that can be set or used only in the environment in which it is defines

predicate

a hexagon-shaped reporter that asks a true/false question

Boolean

either true or false

conditional

a block that controls the code based on a true-or-false condition

global variable

a variable that is usable by all scripts in the program

initialize

set the starting value of a variable

list

a ordered set of items

index

the position number of an item in a list

element

another name for an item in a list

sublist

a list used as an item of another list

data type

what kind of data something is (number, text string, list, etc.)

primitive data type

data types that are built-in

abstract data type

a custom data type that’s meaningful to your program

constructor

constructs one example of the data structure

selector

selects one piece of the data structure

data abstraction

the creation and use of abstract data types in a program

composition of functions

using the result from one block as the input to another

traversing

looking at each item of the list