Data is the lifeline of computing systems. It is classified into various types. The success of a programmer lies on his capability to set one data type apart from the other. Therefore, you should know about the basic data types used in C language in order to avoid any confusion at the later stages.
For example, the number 5 could be classified as an integer while the written character 5 could be a character. This implies that programmers have to learn the data types and ways of assigning them to variables as an important part of C programming.