Java How to Program, Early Objects, 11th Edition

... System.out.printf("%d! = %d%n", counter,
21               factorial(BigInteger.valueOf(counter)));
22         }
23      }
24   }

0! = 1
1! = 1
2! = 2
3! = 6

…
21! = 51090942171709440000 —— 21! and larger values no longer cause overflow
22! = 1124000727777607680000

…
47! = 258623241511168180642964355153611979969197632389120000000000
48! = 12413915592536072670862289047373375038521486354677760000000000
49! = 608281864034267560872252163321295376887552831379210240000000000
50! = 30414093201713378043612608166064768844377641568960512000000000000

Factorial calculations with a recursive method.

Since BigInteger is not a primitive type, we can’t use the arithmetic, relational and equality operators with BigIntegers; instead, we must use BigInteger methods to perform these tasks. Line ...