javascript smallest positive integer not in array code example

Example 1: javascript find smallest number in an array

const arr = [14, 58, 20, 77, 66, 82, 42, 67, 42, 4]
const min = Math.min(...arr)
console.log(min)

Example 2: finding the smallest number in an array javascript

var arr = [5,1,9,5,7];
var smallest = arr[0];

for(var i=1; i<arr.length; i++){
    if(arr[i] < smallest){
        smallest = arr[i];   
    }
}

console.log(smallest);