Every function call statement must include a (possibly empty) parameter list inside parentheses. Every function call statement must be terminated by a semicolon.
You can even call a function that returns a value with a function call statement. The return value is simply ignored.
// Call a function without parameters. DoSomething(); // This is a valid statement, but it doesn't do what you // expect, because it isn't a function call statement. DoSomething; // This is a valid albeit useless statement--the return // value is discarded. abs(5); // Call a function with parameters, which are separated by // commas: DoSomethingElse(x, y, z); // A function can have default values for one or more // parameters! DoSomethingElse();