New Product Or Category

[Draq]

Hi,

I am learning developing to prestashop and i like to add category or product to prestashop.

 

I know that there is possible way with writing to database, but i thing that with using function it will be easier.

 

But I didnt find function for adding product or category.

 

Could be someone so kind, that he writes me name of function and easy example hot to use it?

 

Many thanks!