ology":"MPI","Name":"MPI_Comm_rank","DirectoryName":"mpi_comm_rank","SharedDescription":true,"Description":"Gets the rank of the calling MPI process in the communicator specified. If the calling MPI process does not belong to the communicator passed, MPI_PROC_NULL is returned.","Categories":["Topology"],"Languages":[{"Language":"C","Parameters":[{"Name":"comm","Description":"The communicator to query.","Type":"MPI_Comm"},{"Name":"rank","Description":"The variable in which store the rank found.","Type":"int*