## X04 – Input/Output Utilities

- X04 Introduction
- x04aa – Return or set unit number for error messages
- x04ab – Return or set unit number for advisory messages
- x04ac – Open unit number for reading, writing or appending, and associate unit with named file
- x04ad – Close file associated with given unit number
- x04ba – Write formatted record to external file
- x04bb – Read formatted record from external file
- x04ca – Print real general matrix (easy-to-use)
- x04cb – Print real general matrix (comprehensive)
- x04cc – Print real packed triangular matrix (easy-to-use)
- x04cd – Print real packed triangular matrix (comprehensive)
- x04ce – Print real packed banded matrix (easy-to-use)
- x04cf – Print real packed banded matrix (comprehensive)
- x04da – Print complex general matrix (easy-to-use)
- x04db – Print complex general matrix (comprehensive)
- x04dc – Print complex packed triangular matrix (easy-to-use)
- x04dd – Print complex packed triangular matrix (comprehensive)
- x04de – Print complex packed banded matrix (easy-to-use)
- x04df – Print complex packed banded matrix (comprehensive)
- x04ea – Print integer matrix (easy-to-use)
- x04eb – Print integer matrix (comprehensive)