function hello() { console.log(arguments[0]); console.log(+Array.isArray(arguments)); } hello(5);

Question

Please explain this question
Answer of this code is 5 0

Answer 1

The arguments keyword can used to access the arguments passed to non-arrow functions, (meaning functions defined using the 'function' keyword, not those new ()=>{} ones).
So, even though you did not specify that your function accepts arguments, when you passed 5 to it, arguments[0] can extract the value.

0 because arguments is an array-like object, not an array.

external link:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/arguments