explanation for select random string from array javascript code example

Example 1: pick random string from array javascript

var groceries = [
'milk',
'coriander',
'cucumber',
'eggplant'
]
let mygroceries = groceries[Math.floor(Math.random() * groceries.length)]
console.log(mygroceries)//This gives you any string from groceries

Example 2: js random string from array

const randomElement = array[Math.floor(Math.random() * array.length)];