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Units: A Unit Conversion Program

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11. Readline support

If the readline package has been compiled in, then when units is used interactively, numerous command line editing features are available. To check if your version of units includes the readline, invoke the program with the `--version' option.

For complete information about readline, consult the documentation for the readline package. Without any configuration, units will allow editing in the style of emacs. Of particular use with units are the completion commands.

If you type a few characters and then hit `ESC' followed by the ? key then units will display a list of all the units which start with the characters typed. For example, if you type metr and then request completion, you will see something like this:

You have: metr
metre             metriccup         metrichorsepower  metrictenth
metretes          metricfifth       metricounce       metricton
metriccarat       metricgrain       metricquart       metricyarncount
You have: metr

If there is a unique way to complete a unitname, you can hit the tab key and units will provide the rest of the unit name. If units beeps, it means that there is no unique completion. Pressing the tab key a second time will print the list of all completions.

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