The
factorial(int n) method of Guava's
LongMath Class returns the product of the first n positive integers, which is n!.
Syntax :
public static long factorial(int n)
Parameter: The method accepts only one parameter
n which is of integer type and is to be used to find the factorial.
Return Value: This method return following values:
- This method returns 1 if n is 0.
- This method returns product of the first n positive integers if the result fits in a long.
- This method returns Long.MAX_VALUE if the result does not fit in a long.
Exceptions: The method factorial(int n) throws
IllegalArgumentException if n is negative.
Below programs illustrate the use of LongMath.factorial() method:
Example 1:
Output:
factorial of 10 is : 3628800
factorial of 12 is : 479001600
Example 2 :
