How to run yacc in ubuntu

This article will tell you how to install LEX and YACC packages in your Ubuntu or any Linux based Operating system.

PREREQUISITES

• A PC installed with Ubuntu or any Linux based OS.(You can also be running Ubuntu as a virtual machine using VMWare/VirtualBox in Windows OS.

[See: "How to install Ubuntu as a virtual machine using VMWare player in Windows"]

• A working internet connection.

  (connect your PC to the Internet before you begin).

STEPS:
#To run Lex programs (.l extension) you need to install either 'flex' or 'flex-old' package.
#To run Yacc programs (.y extension) you need to install 'bison' package.

• Open the 'Terminal' in Linux OS by searching 'Terminal' in the search bar.

Step 1) To install Lex package:
Type the exact command (either of the two)

• sudo apt-get install flex
• sudo apt-get install flex-old

Type 'y' when it asks for confirmation (see image below)

Step 2) To install Yacc package:

Type the exact command