What is the difference between Flex/Lex and Yacc/Bison?

Question

What is the difference between Flex & Lex and Yacc & Bison. I searched the Internet wildly and I didn\'t find any solid answer.

Can I install pure Lex and Yacc o

Answer 1

Bison in a part of the GNU project. And yacc is used as a utility on Berkeley Software Distribution (BSD).Though its compatible with yacc, but Lex and Yacc are a thing of the past. Flex and bison are widely used today.