js把数值转为英文缩写

如果您是想把数字转为英文缩写，可以使用以下代码：

function numToWord(num) {
  const ones = ['', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine'];
  const teens = ['', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen'];
  const tens = ['', 'ten', 'twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety'];
  const thousands = ['', 'thousand', 'million', 'billion', 'trillion'];

  if (num == 0) return 'zero';

  let i = 0;
  let words = '';

  while (num > 0) {
    if (num % 1000 != 0) {
      words = numToWordHelper(num % 1000) + thousands[i] + ' ' + words;
    }
    num = Math.floor(num / 1000);
    i++;
  }

  return words.trim();
}

function numToWordHelper(num) {
  const ones = ['', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine'];
  const teens = ['', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen'];
  const tens = ['', 'ten', 'twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety'];

  let words = '';

  if (num % 100 < 10) {
    words = ones[num % 10];
    num = Math.floor(num / 10);
  } else if (num % 100 < 20) {
    words = teens[num % 10];
    num = Math.floor(num / 100);
  } else {
    words = ones[num % 10];
    num = Math.floor(num / 10);

    words = tens[num % 10] + ' ' + words;
    num = Math.floor(num / 10);
  }

  if (num == 0) return words;

  return ones[num] + ' hundred ' + words;
}

例如，`numToWord(123456)` 返回的结果是 "one hundred twenty three thousand four hundred fifty six"。

如果您是想把一个数值转为英文缩写，可以使用以下代码：

function numberToWord(num) {
  const ones = ['', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine'];
  const teens = ['', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', 'seventeen', 'eighteen', 'nineteen'];
  const tens = ['', 'ten', 'twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', 'eighty', 'ninety'];

  if (num < 10) {
    return ones[num];
  } else if (num < 20) {
    return teens[num - 10];
  } else if (num < 100) {
    return tens[Math.floor(num / 10)] + (num % 10 ? ' ' + ones[num % 10] : '');
  } else if (num < 1000) {
    return ones[Math.floor(num / 100)] + ' hundred' + (num % 100 ? ' ' + numberToWord(num % 100) : '');
  } else if (num < 1000000) {
    return numberToWord(Math.floor(num / 1000)) + ' thousand' + (num % 1000 ? ' ' + numberToWord(num % 1000) : '');
  } else if (num < 1000000000) {
    return numberToWord(Math.floor(num / 1000000)) + ' million' + (num % 1000000 ? ' ' + numberToWord(num % 1000000) : '');
  } else {
    return numberToWord(Math.floor(num / 1000000000)) + ' billion' + (num % 1000000000 ? ' ' + numberToWord(num % 1000000000) : '');
  }
}

例如，`numberToWord(123456)` 返回的结果是 "one hundred twenty-three thousand four hundred fifty-six"。