Convert long number into abbreviated string in JavaScript, with a special shortness requirement

Question

In JavaScript, how would one write a function that converts a given [edit: positive integer] number (below 100 billion) into a 3-letter abbreviation -- where 0-9 an

Answer 1

@nimesaram

Your solution will not be desirable for the following case:

Input 50000
Output 50.0k

---

Following solution will work fine.

const convertNumberToShortString = (
  number: number,
  fraction: number
) => {
  let newValue: string = number.toString();
  if (number >= 1000) {
    const ranges = [
      { divider: 1, suffix: '' },
      { divider: 1e3, suffix: 'k' },
      { divider: 1e6, suffix: 'm' },
      { divider: 1e9, suffix: 'b' },
      { divider: 1e12, suffix: 't' },
      { divider: 1e15, suffix: 'p' },
      { divider: 1e18, suffix: 'e' }
    ];
    //find index based on number of zeros
    const index = Math.floor(Math.abs(number).toString().length / 3);
    let numString = (number / ranges[index].divider).toFixed(fraction);
    numString =
      parseInt(numString.substring(numString.indexOf('.') + 1)) === 0
        ? Math.floor(number / ranges[index].divider).toString()
        : numString;
    newValue = numString + ranges[index].suffix;
  }
  return newValue;
};

// Input 50000
// Output 50k
// Input 4500
// Output 4.5k