Look to the second graph where Wolfram Alpha gives a continuous factorial function:
What is the second graph?
It is not the gamma function, since that has $\Gamma(-1)=0!=1$.
Look to the second graph where Wolfram Alpha gives a continuous factorial function:
What is the second graph?
It is not the gamma function, since that has $\Gamma(-1)=0!=1$.
It is a plot of $\Gamma(x+1)$, known to equal $x!$ at integers.