Syntax in C
The rules that dictate the correct format of code for a specific programming language are known as syntax.
Examples of syntax in C are:
- All statements must end with a semicolon,
- Keywords and other code elements are case-sensitive
When compiling C code, an error will occur when the syntax of the code is incorrect.
// Statements must end in a semicolon (;) // correct printf("Hello World!"); // error printf("Hello World!") // Code elements are case sensitive // correct printf("Hello World!"); // error PRINTF("Hello World!");
In C, an escape sequence is a non-visual character used within a string.
\n is an escape sequence that adds a newline to a string.
\t is an escape sequence that adds a tab of spaces to a string.
// \n acts as a newline in a string printf("Hello\nWorld!"); // Outputs: Hello // World! // \t acts as a tab in a string printf("Hello\tWorld!"); // Outputs: Hello World!
Comments in C
In C, comments are text within code that will be ignored by the compiler. They are used to document code.
Line comments begin with a double forward slash,
//. All text after
// will be part of the comment until a new line is reached.
Block comments begin with a forward slash and asterisk,
/* and end with an asterisk and forward slash,
*/. Block comments can span multiple lines as new lines are part of the comment.
// Comments /* This review content is about comments and how they can be used to document code */ // This is a line comment /* This is a block comment */
Compiling C Code with
gcc is an application used to compile C programs into an executable that can run on the target computer.
gcc stands for GNU Compiler Collection.
gcc compiles C code using the code file as an unflagged command-line argument. The output executable file will be called
-o flag followed by some text can be used to designate the name of the output executable file.
gcc script.c gcc script.c -o myProgram