Signal Input and Output
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## Signal Input and Output

### File Input and Output

The opcodes for file input and output are:

- File open/close: fiopen and ficlose.

- File output: dumpk, dumpk2, dumpk3, dumpk4, fout, fouti, foutir, foutk and hdf5write

- File input: readf, readfi, readk, readk2, readk3, readk4, fin, fini and fink

- Utilities for use with the fout opcodes: clear, vincr

- Printing to a file: fprints and fprintks

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