# IGamma

IGamma is a numeric built-in function whose purpose is to compute the Lower Incomplete Beta function of two real valued arguments.

$\gamma(s,x) = \int_0^x t^{s-1}\,e^{-t}\,{\rm d}t .\,\!$

## Contents

### Syntax

 IGamma (a,x);

### Functionality

If a, x are positive real numbers
Number
then the function computes the incomplete gamma function of the arguments.

### Examples

Argument Type Input Result
Numeric
IGamma(3,4)
0.761897

### Notes

Internally this function is implemented as three calls to the Gamma function.