Why do we need strdup()?

Question

While I was working on an assignment, I came to know that we should not use assignments such as :

 char *s=\"HELLO WORLD\";

Programs using such

Answer 1

String literals may be stored in portions of memory that do not have write privileges. Attempting to write to them will cause undefined behaviour. const means that the compiler ensures that the pointer is not written to, guaranteeing that you do not invoke undefined behaviour in this way.