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J64 Available | initial writing: 2004-08-18 last updated: 2005-02-28

J64, the 64 bit version of J, is now available.

- Address space is 64 bits (1.84e19 bytes) instead of 32 bits (4.29e9 bytes).
- Integers are 64 bits instead of 32 bits.
- As before, integer comparisons are exact (not tolerant).
- The default memory limit (Edit|Configure|Parameters... or`` `9!:20` and`9!:21`)`` is`2^62` instead of`2^30` .
- `3&(3!:4)` `` converts integers to sets of 8 characters;`_3&(3!:4)` computes the inverse.

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