express.static public

static is a keyword in the C programming language that is used to declare variables and functions with a static storage duration. When a variable or function is declared as static, it means that its lifetime extends for the entire duration of the program, and its scope is limited to the file in which it is defined.

The static keyword can be used with variables and functions. When used with variables, it instructs the compiler to allocate memory for the variable only once, regardless of how many times the variable is declared. This means that the value of the variable is preserved between function calls.

When used with functions, the static keyword changes the linkage of the function from external to internal. This means that the function can only be called from within the file in which it is defined.

On the other hand, the keyword public is not a keyword in the C programming language. It is commonly used in object-oriented programming languages like C++ and Java to declare a member of a class that can be accessed from outside the class.

In summary, the static keyword in C is used to declare variables and functions with a static storage duration, while the public keyword is not a keyword in C.