Error and Gamma Functions in ANSI C

To use error and gamma functions in ANSI C, you will need to include the mathematics header:

#include<math.h>

1.Error Functions

ANSI C mathematical library provides functions for computing the Gauss error function and its complementary.

Example:

 float nrF = 0.32f;
 double nrD = 0.3232;
 long double nrL = 0.323232;
 /*Error function*/
 float eF = erff(nrF);
 double eD = erf(nrD);
 long double eL = erfL(nrL);
 /*Complementary error function*/
 float ceF = erfcf(nrF);
 double ceD = erfc(nrD);
 long double ceL = erfcl(ceL);

2.Gamma Functions

ANSI C mathematical library provides functions for computing gamma function and the natural logarithm of the gamma function. 

Example:

 float nrF = 0.32f;
 double nrD = 0.3232;
 long double nrL = 0.323232;
 /*Gamma function*/
 float eF = tgammaf(nrF);
 double eD = tgamma(nrD);
 long double eL = tgammal(nrL);
 /*Natural logarithm of the gamma function*/
 float ceF = lgammaf(nrF);
 double ceD = lgamma(nrD);
 long double ceL = lgammal(ceL);

Mathematical notions:

Error function
Gamma function