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

            function converse_number (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(converse_number(100000000000));