B (BASIC Source Code File)
The B Developer file format
Files with the B file extension are associated with different file formats. One is used to use Grand Theft Auto 3 save game data. The other and the one we want to have a more detailed look at is a developer file that stores source code written in a specific programming language. B files contain markup language written in BASIC (Beginner’s All-Purpose Instruction Code), a popular programming language. The files are typically saved in a plain-text format.
Technical details of B files
The code inside the B file can contain the code or a program developed in BASIC as well as notes and functions that reference other files that contain BASIC scrips and programs. B is not the only file format used for BASIC source code files. The probably more wide-spread alternative is the BAS file.