compare alots of number in a list, pickup the greast number

// function that: compare alots of number in a list, pickup the greast number 
function findGreatestNum(numbers){
    let greatestNum = numbers[0];
    for (let num of numbers){
        if (num > greatestNum){
            greatestNum = num;
        }
    }
    return greatestNum;
}

console.log(findGreatestNum([3,4,5,6,7,8,9,10]));