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Thread: how to handle big numbers

  1. #1
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    Lightbulb how to handle big numbers

    How to handle a big number value like
    Math.pow(41,77) gives a large value and I needs to take mod( % ) of that value. So I directly write a stmt as Math.pow(41,77)%119;
    The correct result of this equation is 6(I know its the correct ans. *check it by calculator ). But my code returns 88 so what's wrong in my code?
    How can I rewrite the same code to get the correct output.


  2. #2
    Administrator copeg's Avatar
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    Default Re: how to handle big numbers

    Use a BigInteger to prevent the overflow of an int

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    Default Re: how to handle big numbers

    Integer can hold 6 right? Why we need to go for big integer ?
    The value of Math.pow(41,77) is 1.5 E124 this value can hold in double variable.

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    Super Moderator helloworld922's Avatar
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    Default Re: how to handle big numbers

    A double variable doesn't hold every single digit of 1.5e124. It holds a fixed "mantissa" which is ~16 digits, and an integer exponent.

  5. The Following User Says Thank You to helloworld922 For This Useful Post:

    copeg (August 13th, 2013)

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