Final answer:
A program written with the IDE for Arduino is called a sketch. This term is used specifically in the Arduino environment to refer to user-written code that controls the microcontroller.
Step-by-step explanation:
A program written with the IDE for Arduino is called a sketch. The term sketch refers to the code that you write and upload to an Arduino microcontroller. Unlike traditional software development terms like 'program' or 'application', the Arduino platform uses the more informal term 'sketch' to convey the ease with which users can create and modify code. It's similar to an artist quickly creating a drawing or sketch. This code, composed of functions and commands specific to the Arduino environment, controls the behavior of the microcontroller to perform various tasks.