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Thread: What is this code doing?

  1. #1
    Junior Member
    Join Date
    Apr 2013
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    Default What is this code doing?

    public static long powMod2_32(int prime, int number) {
    int answer2 = 1;
    int p = prime;
    for (int n = number; n > 0; n >>>= 1) {
    if ((n & 1) != 0)
    answer2 *= p;
    p *= p;
    return answer2 & 0xFFFFFFFFL;

    I'm not too advanced with java. I sort of understand what this block of code is doing, but not completely unfortunately. Can someone tell me what it's doing? Thanks!!

  2. #2
    Super Moderator Norm's Avatar
    Join Date
    May 2010
    Eastern Florida
    Thanked 2,460 Times in 2,411 Posts

    Default Re: What is this code doing?

    Add some calls to the println statement after every line in the code that prints out the results of the line that it follows. The print out will show you what the code is doing.

    You will have to break some of the complex expressions up into single expressions to see all the details.
    If you don't understand my answer, don't ignore it, ask a question.

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