A JavaScript function can also be defined using a function expression.
A function expression can be assigned to a variable.
| const x = function (a, b) {return a * b}; |
Once a function expression is stored in a variable, the variable can be used to invoke the function.
| const x = function (a, b) {return a * b}; let z = x(4, 3); |
The function above is an anonymous function, meaning it has no name.
Functions stored in variables do not require names and are always invoked using the variable name.
| The function above ends with a semicolon because it is part of an executable statement. |