Array getting value before being assigned, p5 JavaScript library

Question

I am trying to come up with a simple script from https://editor.p5js.org that uses arrays, but when I define the array, it already assigned a value even though it is an empty array

function setup() {
  createCanvas(400, 400);
}

function draw() {
  background(220);
  let l=[];
  console.log(l);
  noLoop();
  l.push(1);
}

and that is outputting

[1]