Factorial of an integer

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The factorial of an integer is calculated by multiplying all the numbers from 1 to the given number.

F(n) = F(1)*F(2)…F(n-1)*F(n).

We can use recursion to find the factorial of an integer.

public static long factorial(long n) {
	if (n == 1)
		return 1;
	else
		return (n * factorial(n - 1));
}

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