Why does converting numbers like 190000009 to English words result in missing the last digit '9'?

JavaScript Numbers to Words

Issue

When attempting to convert numbers into English words, a bug arises with numbers such as 190000009, which is erroneously converted to "one hundred ninety million." The last digit, "9," is missing from the result.

Explanation

The problem stems from the zeros within the number. When the triConvert function encounters three consecutive zeros, it returns the string "dontAddBigSufix." This instructs the program to omit the term for the corresponding unit (e.g., thousand, million, billion) when attaching suffixes to the digit groupings.

In the case of 190000009, the three middle zeros trigger the return of "dontAddBigSufix" for the second group of three digits, which represents the million value. As a result, the "million" suffix is not added, and the final output skips the last digit.

Code Snippet

The following code segment demonstrates the issue:

for (b = finlOutPut.length - 1; b >= 0; b--) {
    if (finlOutPut[b] != "dontAddBigSufix") {
        finlOutPut[b] = finlOutPut[b] + bigNumArry[bigScalCntr] + ' , ';
        bigScalCntr++;
    }
    else {
        //replace the string at finlOP[b] from "dontAddBigSufix" to empty String.
        finlOutPut[b] = ' ';
        bigScalCntr++; //advance the counter  
    }
}

Solution

The solution is to check whether the corresponding bigNumArry value is "million" or not. If it is, and finlOutPut[b] equals "dontAddBigSufix," then finlOutPut[b] should be replaced with an empty string instead of a space. This ensures that the "million" suffix is not added when there are zeros in the middle of the number.

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