BigIntegerMath factorial() function | Guava | Java The method factorial(int n) of Guava’s BigIntegerMath class is used to find the factorial of the given number . It returns n!, that is, the product of the first n positive integers. Parameters: This method takes the number n as parameter whose factorial is to be found.
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The factorial function can be rewritten recursively as factorial(n) = n × factorial(n – 1) . The factorial of 1 is simply 1. Code Example 6.27 shows the factorial function written as a recursive function.
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