how to make functions in javascript code example

Example 1: js function

function name(parameter1, parameter2, parameter3) {
// what the function does
}

Example 2: How to create a function in javascript

function addfunc(a, b) {
  return a + b;
  // standard long function
}

addfunc = (a, b) => { return a + b; }
// cleaner faster way creating functions!