Compilers textbook pdf

Compiler theory books
Although I absolutely don't regret taking the compilers course, it was the toughest I ever had.
Most CSci courses either had significant theory that had to be learned, or lots of programming, not both.
Compilers had both..
Compiler theory books
Lexical analysis, Syntax analysis, Intermediate code generation, Code optimisation, Code generation.
Like an assembler, a compiler usually performs the above tasks by making multiple passes over the input or some intermediate representation of the same..

What does a compiler do?

A compiler translates a program written in a high level language into a program written in a lower level language.