3.1: Review of C-Native Variables
Although this is not a language course, you should review these concepts, since an understanding this material is required before studying memory pointers. As described here:
"In the C programming language, data types are declarations for memory locations or variables that determine the characteristics of the data that may be stored and the methods (operations) of processing that are permitted involving them."
Read this article. As it explains:
"In computing, a word is the natural unit of data used by a particular processor design. A word is a fixed-sized piece of data handled as a unit by the instruction set or the hardware of the processor. The number of bits in a word (the word size, word width, or word length) is an important characteristic of any specific processor design or computer architecture."