some program statements run when triggered by an event, like a mouse click or a key press

a collection of program statements

a command or instruction. Sometimes also referred to as a code statement

program statements run in order, from top to bottom

form of program documentation written into the program to be read by people and which do not affect how a program runs

Finding and fixing problems in an algorithm or program

a written description of how a command or piece of code works or was developed

allows a program to change the value represented/stored by a variable ( = )

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

an ordered sequence of characters