**ShinyGardevoir wrote:**

Is there a way to find the gamma function of a complex number on a TI-84 Plus CE?

Yes, the routine for the beta function I used in this post works for complex numbers as well.

If you just want to calculate the gamma function, then you can simplify it to this:

**Code:**

```
A→Z
```

If 0>real(A

1-Z→Z

e^((Z-.5)ln(Z+8.5)-Z-8.5+ln(√(2π)(1+sum({5716.4001882743,-14815.304267684,14291.492776575,-6348.1602176415,1301.6082860583,-108.17670535144,2.6056965056118,-0.0074234525,5.384136×10^-8,-4.02353×10^-9}/(Z-1+cumSum(binomcdf(9,0

If 0>real(A

2πi/Ans/(2isin(πA

Where the input is in A and Γ(A) is stored to Ans.