javascript 实现斐波那契数列

量比指标 • 2022-6-10 • html-js-css • 阅读 24

斐波那契数列 1 1 2 3 5 8 13…

DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title>循环语句title>
head>
<body>
	<script type="text/javascript">
	// 斐波那契数列 1 1 2 3 5 8 13......
		var n = parseInt(window.prompt('input'));
		if(n > 2){
			var first = 1, second = 1, third;
			for(var i = 0; i < n - 2; i ++){
				third = first + second;
				first = second;
				second = third;
			}
			document.write(third);
		}else{
			document.write('请输入大于2的数');
		}
	script>
	
body>
html>