JSFiddle - React, Tailwind, and code Playground

JavaScript

function test (labelValue) 
{
    // Nine Zeroes for Billions
    return Math.abs(Number(labelValue)) >= 1.0e+9

    ? Math.abs(Number(labelValue)) / 1.0e+9 + "B"
    // Six Zeroes for Millions 
    : Math.abs(Number(labelValue)) >= 1.0e+6

    ? Math.abs(Number(labelValue)) / 1.0e+6 + "M"
    // Three Zeroes for Thousands
    : Math.abs(Number(labelValue)) >= 1.0e+3

    ? Math.abs(Number(labelValue)) / 1.0e+3 + "K"

    : Math.abs(Number(labelValue));
}
   
alert(test(6800000));