An argument is any area in a block that accepts user input, or another block. It could be

a Boolean Block or a value placed inside of a variable or block.

A variable is a changeable value recorded in Scratch's memory. Variables can only hold one value at a

time, unlike lists. These values can be either numbers or strings — any text. Clicking on an isolated

variable in the scripts area displays a small bubble reporting the value of the variable. Unlike many other

programming languages, variables must be created prior to when the project actually runs. This only

results in a small amount of RAM being used to store the value for use when the project actually runs.

Variables are created with the button in the Variables palette.