how to manipulate integers very very large?

[sachin770]

i am a beginner .can you give me idea how we can manipulate "LARGE" integers (positive or negative) of arbitrary size. These integers could be greater than MAX_INT or smaller than MIN_INT.

using arrays or string?

[JosAH]

Just use the BigInteger class.

kind regards,

Jos

[sachin770]

i mean without using bigintegers and number can be greater than big integer also...............i.e 999999999999999999999999999999999999999

[JosAH]

i mean without using bigintegers and number can be greater than big integer also...............i.e 999999999999999999999999999999999999999

Do you mean you want to use big integers but you don't want to use the BigInteger
class? How strange ... can you explain why you want to restrict yourself?

kind regards,

Jos

[sachin770]

i want to know how it works because i am making progamme in ocaml to calculate big integers without using any directories........pls help .....give me idea....how i can add two big integer in two different list or array????????????

[JosAH]

i want to know how it works because i am making progamme in ocaml to calculate big integers without using any directories........pls help .....give me idea....how i can add two big integer in two different list or array????????????

A BigInteger doesn't use any directories; I don't know who told you that. The
following example calculates 1000! (factorial). See how simple it is:

BigInteger fac= BigInteger.ONE;
for (int i= 2; i <= 1000; i++)
   fac= fac.multiply(new BigInteger(""+i));
System.out.println("1000! = "+fac);
 

Read the API documentation for this class and see how one of its constructors
can create a BigInteger given some other representation of such a number.

kind regards,

Jos