how to use the largest number in javascript code example

Example 1: greater number in arraya jd

var array = [3 , 6, 2, 56, 32, 5, 89, 32];
var largest= 0;

for (i=0; i<=largest;i++){
    if (array[i]>largest) {
        var largest=array[i];
    }
}




console.log(largest);

Example 2: javascript index of biggest number

arr.indexOf(Math.max(...arr))