I understand using paper for Diagrams and arquitechtual design, but for coding? On college I remember having to code on paper and you simply can't test your co

I understand using paper for Diagrams and arquitechtual design, but for coding? On college I remember having to code on paper and you simply can't test your code for typos or small error, even if your logic was perfect professor give you marks for a missing ';' note: the class was evaluating the Logic / algorihtm not basic code syntax