CODEWITHSUNDEEP
java
ishaq ahmad
ishaq ahmad

Reputation: 75

How can i extend data type in java

How i can create my own data type in java that could store a 16-byte integer value

the longest data-type in java by size is "long" which is 8-byte and it could store 19-digit integer value but, i want to find the factorial of 25 and the factorial of 25 is 26-digit(15511210043330985984000000). now the problem is i have no such a data-type in java that could store such huge value of 26-digits or more.

if there is any 

public long factorial(int number)
{
    int i=1;
    long factorial=1;

    for(i=1;i<=number;i++)
    {
        factorial = factorial * i; 
    }
    return factorial;
}

Upvotes: 0

Views: 2241

Answers (2)

NPE
NPE

Reputation: 500257

now the problem is i have no such a data-type in java that could store such huge value

That's not quite true. There is BigInteger.

See this answer for an implementation of factorial that uses BigInteger.

Upvotes: 4

Jon Skeet
Jon Skeet

Reputation: 1500105

Now the problem is i have no such a data-type in java that could store such huge value of 26-digits or more.

Have you looked at java.math.BigInteger? Note that this is a class (a reference type) rather than a value type, but it's immutable which means you can think of it as being somewhat value-like.

Upvotes: 5

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