Closed geekftz closed 3 years ago
// 记录fib(n - 1)和fib(n-2) 避免重复计算 从下标2开始向上计算 function fib1(n) { if (n < 0) throw new Error('输入的数字不能小于0');
if (n < 2) { return n; }
let f0 = 0; let f1 = 1; let fn = f0;
// 从下标为2开始 let i = 2;
while (i <= n) { fn = f0 + f1; f0 = f1; f1 = fn; i++; }
return fn; }
var n = 3; var res1 = fib1(n); console.log('%c res1 = %s', 'color: #007300', res1);
// 记录fib(n - 1)和fib(n-2) 避免重复计算 从下标2开始向上计算 function fib1(n) { if (n < 0) throw new Error('输入的数字不能小于0');
if (n < 2) { return n; }
let f0 = 0; let f1 = 1; let fn = f0;
// 从下标为2开始 let i = 2;
while (i <= n) { fn = f0 + f1; f0 = f1; f1 = fn; i++; }
return fn; }
var n = 3; var res1 = fib1(n); console.log('%c res1 = %s', 'color: #007300', res1);