## 4.15.3. Unsigned long long Type

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A new type, MPI_UNSIGNED_LONG_LONG in C and MPI::UNSIGNED_LONG_LONG in C++ is added as an optional datatype.

Rationale. The ISO C9X committee has voted to include `long long` and `unsigned long long` as standard C types. ( End of rationale.)

Up: New Predefined Datatypes Next: Canonical MPI_PACK and MPI_UNPACK Previous: Signed Characters and Reductions

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MPI-2.0 of July 18, 1997
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