C is a programming language that has a set of rules, called syntax, that govern how code should be written. Some of the basic syntax rules for C include:

1. Statements must end with a semicolon: Each statement in C must be terminated with a semicolon. For example:

int a = 10;

2. Code blocks are enclosed in curly braces: Code blocks, such as the bodies of functions and loops, are enclosed in curly braces. For example:

int main() { // code goes here }

3. Comments are indicated with a forward slash and an asterisk: Comments are used to add notes and explanations to code and are ignored by the compiler. Comments in C are indicated with a forward slash and an asterisk, and must be closed with an asterisk and a forward slash. For example:

/* This is a comment */

4. Identifiers must start with a letter or an underscore: Identifiers are used to name variables, functions, and other elements in a C program. Identifiers must start with a letter or an underscore and can contain letters, digits, and underscores. However, they cannot contain spaces or special characters, and they are case-sensitive. For example:

int myVariable;

5. Keywords must be written in lowercase: C has a set of reserved words, known as keywords, that have special meanings in the language. Keywords must be written in lowercase and cannot be used as identifiers. Some common keywords in C include int, char, and while.

It is important to carefully follow the syntax rules of C to ensure that your code is correct and can be compiled without errors. There are many other syntax rules in C, and it is important to review the documentation and examples to understand all of the rules and conventions of the language.