difference between %e/E, %f/F and %g/G in program C

Code Example - difference between %e/E, %f/F and %g/G in program C

                
                        void main(int argc, char* argv[])  
{  
        double a = 4.5;
        printf("=>>>> below is the example for printf 4.5\n");
        printf("%%e %e\n",a);
        printf("%%f %f\n",a);
        printf("%%g %g\n",a);
        printf("%%E %E\n",a);
        printf("%%F %F\n",a);
        printf("%%G %G\n",a);
          
        double b = 1.79e308;
        printf("=>>>> below is the exbmple for printf 1.79*10^308\n");
        printf("%%e %e\n",b);
        printf("%%f %f\n",b);
        printf("%%g %g\n",b);
        printf("%%E %E\n",b);
        printf("%%F %F\n",b);
        printf("%%G %G\n",b);

        double d = 2.25074e-308;
        printf("=>>>> below is the example for printf 2.25074*10^-308\n");
        printf("%%e %e\n",d);
        printf("%%f %f\n",d);
        printf("%%g %g\n",d);
        printf("%%E %E\n",d);
        printf("%%F %F\n",d);
        printf("%%G %G\n",d);
}