# Language Extensions: I/O Formatting

The following are extensions allowed in I/O Formatting:

- The Q edit descriptor

- The dollar sign ($) edit descriptor and carriage-control character

- The backslash (\) edit descriptor

- The ASCII NUL carriage-control character

- Variable format expressions

- The H edit descriptor

  This is an older Fortran feature that has been deleted in Fortran 95. Intel® Fortran fully supports this feature.

Parent topic: Summary of Language Extensions