When we refer to a C data type, we are referring to the attributes that a piece of program data has. As you will learn, certain data types are better suited to specific tasks than other data types, even though more than one data type might work. Selecting the right data type often results in a program that runs faster and uses less memory. In the μc world, where speed and memory are rare commodities, it pays to know what your data type choices are. In this chapter you will learn about the data types the Arduino C brings to the table. Arduino C supports almost all of ANSI C’s data types.