Arguments

The code inside a function often needs information passed to it.
You can define this information by adding parameters to the declaration allowing you to pass in arguments.
When a variable is passed to a subroutine or function it is called an argument.
The value used in place of the parameter when we make the procedure call is called an argument.

too many - ignored
too few - undefined

function add() { 
   var tempValue = 0; 
   for (I = 0; I < arguments.length; i++) 
   { 
      tempValue += arguments[i]; 
   } 
   return tempValue; 
} 
var myTotal = add(1,2,3,4,5,6); 

Passing in Arguments

Method 1 - using individual variables

function myFunction(arg1, arg2, arg3) { 
   return arg1 + arg2 + arg3; 
} 
const myString = myFunction("first", "second", "third"); 

Method 2 - passing in an object and then use object destructuring to pull out the individual arguments

function myFunction(arguments) { 
   return arguments.arg1 + arguments.arg2 + arguments.arg3; 
} 
const myString = myFunction( 
   { arg1: "first", 
     arg2: "second", 
     arg3: "third" 
   }