How to make other parameters not required?

Question

typescript

I need to create a function that takes three parameters. In this function, only the first parameter is required, and the second and third may not be passed.

How to implement it? Give me a small example if possible...

Answer 1

function test(a, b=null, c=null) {
    console.log(a);
     if(b) console.log(b);
     if(c) console.log(c);
}

test(1) // консоль: 1
test(1, 2) // консоль: 1, 2

Answer 2

Are we talking about typescript?

function test (a: number, b?: number, c?: number) {
  console.log(a);
  if (b) console.log(b);
  if (c) console.log(c);
}

test(1) // консоль: 1
test(1, 2) // консоль: 1, 2