To understand and learn the C programming language you have to first understand the basic building blocks of C language which includes Tokens, Semicolons, Comments, White spaces etc.

>> Tokens: In C programming language 6 types of tokens are available that are

1). Keyword
2). Identifier
3). Constant
4). String
5). Operator
6). Special Symbols

>> Semicolons are used for the termination of the Statement

>> Comments are added in C language in between these symbols /* */

>> White Spaces are ignored by C compiler.

For Further reading check: http://gatecrack.org/basic-building-blocks-in-c-programming-language

Thanks