Is it illegal to carry a knife, in your pocket in public in SA?

Yo, I just got this knife off the internet and I bought it for 2 reasons, showing off and legitimate self defense, since I already have a knife for work and stuff.

The self defense thing is because with all the bad **** happening to people my age right now it kinda occurred to me that I should be more safe.

But I've run into a brick wall, am I legally allowed to carry this knife in public? (it is about 3 inches (blade length), it folds and its essentially a flick knife). Because I already keep it on my person at home.

Please don't answer with **** like 'Take up a martial art instead' or 'knives r bad'

Thanks