declare function javascript

function myFunction(p1, p2) {
  return p1 * p2;   // The function returns the product of p1 and p2
}/* Declare function */
function myFunc(param) {
  // Statements 
}function myFunction(var1, var2) {
  return var1 * var2;
}function addfunc(a, b) {
  return a + b;
  // standard long function
}

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