Anger creates problem but sometime it is necessary to be angry. Your anger will create problem but you can be stress free and hiden problem will come out.
In anger we must have to control ourselves and do not try to harm other, we should show anger verbally, you may shout but you can not shoot.
Show anger against crime but do not try to become a criminal for criminal. Show your anger on someone to make him realised about his wrong work or for his crime.
Anger removes depression but be careful from anger.