MPI Standard Data Types

For reasons of portability, MPI predefines its elementary data types. The table below lists those required by the standard.

C Data Types Fortran Data Types
MPI_CHAR signed char MPI_CHARACTER character(1)
MPI_SHORT signed short int    
MPI_INT signed int MPI_INTEGER integer
MPI_LONG signed long int    
MPI_UNSIGNED_CHAR unsigned char    
MPI_UNSIGNED_SHORT unsigned short int    
MPI_UNSIGNED unsigned int    
MPI_UNSIGNED_LONG unsigned long int    
MPI_FLOAT float MPI_REAL real
MPI_DOUBLE double MPI_DOUBLE_PRECISION double precision
MPI_LONG_DOUBLE long double    
    MPI_COMPLEX complex
    MPI_DOUBLE_COMPLEX double complex
    MPI_LOGICAL logical
MPI_BYTE 8 binary digits MPI_BYTE 8 binary digits
MPI_PACKED data packed or unpacked with MPI_Pack()/ MPI_Unpack MPI_PACKED data packed or unpacked with MPI_Pack()/ MPI_Unpack