A function is a named group of statements. JavaScript functions are declared with the function keyword followed by the function name and parameter list in parentheses (). For this box, you're going to ...

For example, using closures along with higher-order functions used to be the only way we could have “private” or tamper-proof variables in JavaScript: ...

including JavaScript, a functional programmer has unique considerations to approach and use functions. This tutorial explains what is different and special about a functional programmer's approach, ...