--- title: Happy numbers id: 594810f028c0303b75339ad1 challengeType: 5 videoUrl: '' localeTitle: 快乐的数字 --- ## Description

幸福的数字由以下过程定义:

从任何正整数开始,将数字替换为其数字的平方和,并重复该过程直到数字等于1(它将保持不变),或者它在一个不包括1的循环中无休止地循环。这些数字这个过程在1结束的是幸福的数字,而那些不以1结尾的数字是不愉快的数字。

实现一个函数,如果数字是满意的,则返回true,否则返回false。

## Instructions
## Tests
```yml tests: - text: happy是一种功能。 testString: 'assert(typeof happy === "function", "happy is a function.");' - text: happy(1)应该返回一个布尔值。 testString: 'assert(typeof happy(1) === "boolean", "happy(1) should return a boolean.");' - text: happy(1)应该回归真实。 testString: 'assert(happy(1), "happy(1) should return true.");' - text: happy(2)应该返回虚假。 testString: 'assert(!happy(2), "happy(2) should return false.");' - text: happy(7)应该回归真实。 testString: 'assert(happy(7), "happy(7) should return true.");' - text: happy(10)应该回归真实。 testString: 'assert(happy(10), "happy(10) should return true.");' - text: happy(13)应该回归真实。 testString: 'assert(happy(13), "happy(13) should return true.");' - text: happy(19)应该回归真实。 testString: 'assert(happy(19), "happy(19) should return true.");' - text: happy(23)应该回归真实。 testString: 'assert(happy(23), "happy(23) should return true.");' - text: happy(28)应该回归真实。 testString: 'assert(happy(28), "happy(28) should return true.");' - text: happy(31)应该回归真实。 testString: 'assert(happy(31), "happy(31) should return true.");' - text: happy(32)应该回归真实: testString: 'assert(happy(32), "happy(32) should return true:.");' - text: happy(33)应该返回虚假。 testString: 'assert(!happy(33), "happy(33) should return false.");' ```
## Challenge Seed
```js function happy (number) { // Good luck! } ```
## Solution
```js // solution required ```