scope: where variables can be accessed. If they are defined outside the setup they can be used anywhere inside the whole program. If they inside a block of code they are local variables and will only work within that block.
system properties: similar to variables in that the data, what it represents, has the possibility to be different each time.
"if then" statement: a conditional statement. action happens based on if something is true or false.
Example:
void draw () {
if(mousePressed == true) {
line(pmouseX, pmouseY, mouseX, mouseY); //x, y, width, height
stroke(255, mouseX, mouseY);
}
}
we use a double equal sign as the equality comparator. It checks if the things on either side of it are equal to each other.
constant: the opposite of a variable (it will be the same every time). typed in all capital letters.