When do you use der, das, die, and dem

[destineewalden]

I'm a pre- intermediate and I don't know when to use them. I started learning German when I was 10 so I didn't really don't understand.

[itsDini]

Der is for masculine nouns in the nominative case, das for neuter in nominative, die for feminine in nominative, and finally dem for masculine nouns in the dative case.

[kwis20171]

Wrong. Dem for masculime and neuter in dative case.

Den is masculine accusative and das is neuter accusative.

He is a full graph.

https://upload.wikimedia.org/wikipedia/commons/c/cb/German_definite_article_declension.png

[destineewalden]

thanks