what are the codes for arrow keys to use in glut keyboard callback function

Hi, I have a keyboard callback function that I use in glutKeyboardFunc. In there, there is the switch that takes different parameters. I’m just not sure what is the character code for space or the arrow keys…?
I hope someone here can help.
Thank you,
Luke

for arrow keys you will need to use glutSpecialFunc(); Example:

main()
{
glutSpecialFunc(SpecialInput);
}

void SpecialInput(int key, int x, int y)
{
switch(key)
{
case GLUT_KEY_UP:
//do something here
break;
case GLUT_KEY_DOWN:
//do something here
break;
case GLUT_KEY_LEFT:
//do something here
break;
case GLUT_KEY_RIGHT:
//do something here
break;
}

glutPostRedisplay();

}

Thank you,
Luke