Question

How to use lgamma() function to get the natural logarithm of the absolute value of the gamma function of N in C++

Answer 1

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
	cout << "lgamma(0.9) = " << lgamma(0.9) << endl;
	cout << "lgamma(10) = " << lgamma(10) << endl;
	cout << "lgamma(0.5) = " << lgamma(0.5) << endl;
	cout << "lgamma(1) = " << lgamma(1) << endl;

	return 0;
}

/*
run:

lgamma(0.9) = 0.0663762
lgamma(10) = 12.8018
lgamma(0.5) = 0.572365
lgamma(1) = 0

*/

 

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