CODEWITHSUNDEEP
c++
Yash Kant
Yash Kant

Reputation: 498

What's the limit of long long int ?

I find numeric limits of long long int insufficient. Is there any other numeric type in C++ like big integer in java?

I stumbled upon this question recently and didn't knew how to tackle it..... https://blog.codechef.com/2009/07/02/tutorial-for-small-factorials/

Upvotes: 1

Views: 52173

Answers (3)

Subash Chandra Manohari
Subash Chandra Manohari

Reputation: 31

You can use the C++ library <boost/multiprecision/cpp_int.hpp> for such problems.

For example:

#include <boost/multiprecision/cpp_int.hpp>
using boost::multiprecision::cpp_int;
using namespace std;
int main()
{
    cpp_int f = 1;
    for(int i = 1; i <= 100; i++)
        f *= i;
    cout << "100! = " << f << '\n';
}

This will give the output

100! = 93326215443944152681699238856266700490715968264381621468592963895217599993229915608941463976156518286253697920827223758251185210916864000000000000000000000000

To know more about C++ boost library, you can refer here and here

Upvotes: 3

rbashish
rbashish

Reputation: 2143

Type Name - long long

Bytes - 8

Range of Values - –9,223,372,036,854,775,808 to 9,223,372,036,854,775,807

Ref: Microsoft

Upvotes: 6

encoreleeet
encoreleeet

Reputation: 374

unsigned long long int is biggest integer type in standard C++ ( it can hold numbers from 0 to 18 446 744 073 709 551 615 ), if you want bigger ones you may need to search for some bignum libraries like this: http://www.ttmath.org/

Upvotes: 12

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