How to divide two large integers in java?

Question

I want to divide two large integers,

a = 23546654
b = 24979799

and to get the result in double.

You can use double for your a and b variables, that will solve your problems. — Marcelo, Jan 04 '12 at 13:22
Disagree. Won't work for BigInteger objects, and I think this is what author had in mind. — ŁukaszBachman, Jan 04 '12 at 13:24
possible duplicate of [Java: dividing 2 ints makes an int?](http://stackoverflow.com/questions/787700/java-dividing-2-ints-makes-an-int) — Thomas Clayson, Jan 04 '12 at 13:24
@Mitch I just put a comment up because I wanted to help, but the question doesn't really seem to have enough research. — Marcelo, Jan 04 '12 at 13:26

score 3 · Answer 1 · answered Jan 04 '12 at 13:23

3

Try

double x = ((double) a) / ((double) b)

which first converts your ints to doubles and then does the division. If you have BigIntegers (which your tag indicates) you may use BigInteger.doubleValue() to extract the double value.

answered Jan 04 '12 at 13:23

Howard

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Actually, double x = a / double(b) would suffice. – Jaco Van Niekerk Jan 04 '12 at 13:58

score 1 · Answer 2 · edited Jan 04 '12 at 13:27

1

BigInteger class has a divide method.

BigInteger result = a.divide(b);

edited Jan 04 '12 at 13:27

codeling

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answered Jan 04 '12 at 13:25

Abhishek bhutra

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Even better would be divideAndRemainder method which will help the OP to get a double/floating point number. http://docs.oracle.com/javase/1.4.2/docs/api/java/math/BigInteger.html#divideAndRemainder%28java.math.BigInteger%29 – Thomas Clayson Jan 04 '12 at 13:27

score 1 · Answer 3 · answered Jan 04 '12 at 13:26

1

This are plain int rather than BigInteger.

All you need is

double ratio = (double) a / b;

answered Jan 04 '12 at 13:26

Peter Lawrey

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How to divide two large integers in java?

3 Answers3

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