javascript function that stored number put in by user code example

Example 1: declare function javascript

function myFunction(var1, var2) {
  return var1 * var2;
}

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!