TRUNCATED_NORMAL, MATHEMATICA notebooks which compute and store selected values associated with the truncated normal distribution.
The computer code and data files made available on this web page are distributed under the GNU LGPL license.
TRUNCATED_NORMAL is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATHEMATICA version and a MATLAB version and a Python version.
You can go up one level to the Mathematica source codes.