cant figure how to limit my bones rotation

i figured out going into pose mode,selecting the bone.then adding constraints.
constrain rotation.
then i click on example x rotation & try to adjust the values but this is where it doesnt seem to negative value seems ok but if i adjust the positive value i dont see any change. i can rotate it freely

any detailed tutorials on this or help???

well nevermind i watched a really good tutorial on ytube :smiley: