C/math.h/tgamma

tgamma: returns the gamma function of arg

<source lang="cpp">

//Declaration: float tgammaf(float arg);

              double tgamma(double arg); 
              long double tgammal(long double arg);  

 
 #include <math.h>
 #include <stdio.h>
 int main(void)
 {
   printf("%f\n", tgamma (1.2));
   return 0;
 }
        
       /*0.918169*/ 
          
      </source>