pltw

Sprite

Graphic object that may be moved on screen or otherwise manipulated

Variable

A placeholder in a device's memory that stores a value a program is using

Data Type

The type of information stored in a variable, common data types are number, string, and boolean

Initialize

To assign a variable its initial, or first, value

Trace table

A chart used by programmers to keep track of the values of variables in their program

Trace an algorithm

the process of following the flow of an algorithm step by step to make sure it works correctly

Assignment statement

A line of code that assigns a value to a variable

Decompose

To break a problem down into smaller pieces

Pixel

Any one of the very small dots that together form the picture on a digital screen. The word pixel is short for picture element.

Declare

To create a variable in a program and give it a name

Global

A keyword used when declaring a variable. "Global" makes the variable available to all the blocks in the program

Scope (of a variable)

The part of a program where a variable is visible and can be used by the code

Design process

A systematic, problem solving strategy that designers follow to come up with a solution to a problem