XL Fortran Input/Output

XL Fortran supports both synchronous and asynchronous input/output (I/O). Synchronous I/O halts an executing application until I/O operations complete. Asynchronous I/O allows an application to continue processing while I/O operations occur in the background. Both I/O types support the following file access methods:

Each method of access offers benefits and limitations based on the I/O concepts of, Records, Files and Units.

This section also provides explanations of the IOSTAT= specifier codes that can result when using XL Fortran I/O statements. IBM Copyright 2003