一个小球从100米落下，每次落下弹起的高度是上一次的一半，问需要几次后高度小于10米？我练习所以用了

// 匿名函数
let fren = 0;
let fre = function(height) {for (let i = 0; height >= 10; i++) {fren++;height = height * 0.5}return fren;
}
console.log(fre(100));

let frequency = 0;
// 命名函数
function ball(height) {for (let i = 0; height >= 10; i++) {frequency++;height = height * 0.5}return frequency;
}
console.log(ball(100));

// 自执行函数
let frequen = 0;
let first = (function(height) {for (let i = 0; height >= 10; i++) {frequen++;height = height * 0.5}return frequen;
}(100));
console.log(first);