I’m a beginner and I’m wondering how to create a function that multiplies an indeterminate number in Javascript

Question

I’m a beginner in the world of programming and am doing my first projects in Javascript. I ran into this simple problem that I’m having trouble solving. I need a function that performs an operation at an undetermined amount of values. It does not necessarily have to be a multiplication, I would like to know for any operation (sum, subtraction, multiplication and division) how to create a function that calculates an indeterminate number of values that I pass. Always check the pre-determined amount of values. For example:

function mult (a,b) {
   console.log (a * b)
   
}

mult (2,3)

In the above case I can only pass two values. If you pass 3, it will discard the third element.

I would like to do an undetermined amount of values, either by passing the mult () 3 values or 10 values the function multiplies all. How can I do this?

Answer 1

This is very simple.

Every JS function has a local variable called arguments, which stores function parameters or arguments in Object form

In this example the function will do what you want

function mult (){ 
   let params = arguments;
   let result = 1;
   for(let i in params){
       result = result * params[i]; 
    }
   console.log(result);
   return result;
}
        
mult (2,3)