I don't understand. Whta's argument?

Question

https://code.sololearn.com/Wjh6Zl44Enlq/?ref=app

Answer 1

It is not argument, it is arguments, with s.

It is a special reserved keyword in functional scope.

When a function is called, for example, findMax(4, 5, 6)

The arguments passed into the function is converted to an array named arguments [4, 5, 6]

https://code.sololearn.com/W28N94JjgF3M/?ref=app

Answer 2

Arguments is an array-like which contain the values of arguments passed to the function .In your code the arguments passed to findMax() are 4 5 and 6.
It is good idea to use -Infinity the lowest value that will be remplaced by each arguments values passed to findMax.