JavaScript Tutorials

Invocation Expressions

An invocation expression is JavaScript’s syntax for calling (or executing) a function or method. It starts with a function expression that identifies the function to be called. The function expression is followed by an open parenthesis, a comma-separated list of zero or more argument expressions, and a close parenthesis. 

Some examples:

f(0) // f is the function expression; 0 is the argument expression.
Math.max(x,y,z) // Math.max is the function; x, y and z are the arguments.
a.sort() // a.sort is the function; there are no arguments.