The lightest meson having a positive or negative charge and a rest mass 273 times that of the electron, or no charge and a rest mass 264 times that of the electron. It is the most important contributor to the force which binds the atomic nucleus together.
In particle physics, pion (short for pi meson) is the collective name for three subatomic particles: π0, π+ and π−. Pions are the lightest mesons and play an important role in explaining low-energy properties of the strong nuclear force.
Pion is an extensible, but lightweight IDE. It is planned that Pion offers support for debuggers, compilers and other third party utilities by the use of the Pion Interface & Extension System. By default Python and C/C++ will be supported languages.