Question

How to get the number of arguments of a function with dynamic number of arguments in JavaScript

Answer 1

function f(...args) {
    console.log(args);

    return arguments.length;
}
 
console.log(f(1, 4, 5, 7, 3, 9));
 
 
 
/*
run:
 
[ 1, 4, 5, 7, 3, 9 ]
6
 
*/

 

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Answer 2

function f(/*...*/) {
    return arguments.length;
}
 
console.log(f(1, 4, 5, 7, 3, 2, 98));
 
 
 
/*
run:
 
7
 
*/

 

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