有一个数字，比如 1234， 写一个函数把它转成它的英文写法，上面这个应该输出 one thousand two hundred and thirty four
英文翻译：
0 - 9 ： zero, one ……
10 - 19 ： ten, eleven……
20 - 100： twenty, twenty one……
100: one hundred
111 : one hundred and eleven
121 : one hundred and twenty one
1015: one thousand and fifteen
100 001: one hundred thousand and one
121886: One hundred and twenty-one thousand eight hundred and eighty-six
代码如下：<html lang="en">
<head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> <style> .result{ margin-top: 30px; padding: 20px 10px; border: 1px solid #999; background-color: beige } </style> </head> <body> <p>给你1234， <br/>输出 one thousand two hundred and thirty four</p> <input id="num" type="number" /> <button onclick="setEnglish()">生成</button> <div class="result" id="result"></div> </body> <script> const arr1 = ['zero', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine'], arr2 = ['ten', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineTeen'], arr3 = ['twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety'], arr4 = ['hundred', 'thousand', 'million', 'billion', 'trillion', 'quadrillion']; function setEnglish(){ let num = document.getElementById('num').value
if(!num){
alert('请输入内容')
}
let res = this.numToEnglish(num) document.getElementById('result').innerText = res } function numToEnglish(num){ strnum = num.toString() // 这一个需要用到 if(num >= 0 && num < 10){ return arr1[num] }else if(num >= 10 && num < 20){ let key = strnum.substring(1) return arr2[key] }else if(num >= 20 && num < 100){ let s = strnum.substring(0,1)-2 // 十位 let g = strnum.substring(1) // 各位 return `${arr3[s]}${g > 0 ? ' '+arr1[g] : '' }` }else if(num >= 100 && num <1000){ let b = arr1[strnum.substring(0,1)] + " " + arr4[0] // 百位 return parseInt(strnum.substring(1)) == 0 ? b : b + " and " + numToEnglish(parseInt(strnum.substring(1))) }else{ let arrnum = parseInt(num).toLocaleString().toString().split(',') let len = arrnum.length let ret = "" console.log('arrnum-->', arrnum) for(let i = len; i > 0; i--){ // toLocaleString 整数部分每三位加一个逗号，切割成数组后，进行循环 let index = len - i // arr4 的下标 let res = ''// let num = 1008663 // arrnum = ['1', '008', '663'] // length = 3 // i = 3 index = 0 arrnum[index] = 1 // i = 2 index = 1 arrnum[index] = 008 // i = 1 index = 2 arrnum[index] = 663 if(i > 1){ // res =numToEnglish(parseInt(arrnum[index])) + ' ' + arr4[i -1] ret += res + ' ' }else{ // 数组的最后一个 if(arrnum[index] > 100){ ret += numToEnglish(parseInt(arrnum[index])) }else{ ret += ' and ' + numToEnglish(parseInt(arrnum[index])) } } } return ret } } </script> </html>