Question

I’m making a program that turns a large number into a string, and then adds the characters of that string up. It works fine, my only problem is that instead of having it as a normal number, Java converts my number into standard form, which makes it hard to parse the string. Are there any solutions to this?

public static void main(String ags[]) {
    long nq = (long) Math.pow(2l, 1000l);
    long result = 0;
    String tempQuestion = Double.toString(nq);
    System.out.println(tempQuestion);
    String question = tempQuestion.substring(0, tempQuestion.length() - 2);
    for (int count = 0; count < question.length(); count++) {
        String stringResult = question.substring(count, count + 1);
        result += Double.parseDouble(stringResult);
    }
    System.out.println(result);

Answer 1

Other answers are correct, you could use a java.text.NumberFormat (JavaDoc) to format your output. Using printfis also an option for formatting, similar to NumberFormat. But I see something else here. It looks like you mixed up your data types: In

nq = (long) Math.pow(2l, 1000l);

you are already truncating the double return value from Math to a long. Then you should use long as data type instead of double for the conversion. So use Long.toString(long), this will not add any exponent output.

Use Long.toString(nq) instead of Double.toString(nq); in your code.