A parameter is what value a function takes in when it is defined. parameter would be numthe value assigned to the parameter is the argument. the array [1,2,3,4] would be the argument. code example

Example 1: arguments object in javascript

var sum = 0;
function addAll(){
    for (var i = 0; i<arguments.length; i++){
        sum+=arguments[i];
    }
    console.log(sum);
}

addAll(1, 2, 3, 4, 5, 6, 7, 8, 9,10); //we can provide inifite numbers as argument

Example 2: arguments object in javascript

function test(a, b, c){
    // console.log(arguments);
    // console.log(JSON.stringify(arguments));
    // console.log(typeof a);

    // var sum = 0;
    // for (var i = 0; i<arguments.length; i++){
    //     sum += arguments[i];
    // }
    // console.log(sum);

    //for (var i = 0; i<arguments.length; i++){
    //    console.log(arguments[i]);
    //}
  
    console.log(arguments[0]);
}

test(10, 20, 30);