input — Get user response
The input
function provides an easy method for users to get a
simple response from the keyboard. The string argument is printed
on the standard output (usually the screen), and the program waits
for the user response. input
then returns the input, which can be
either a string, or a number. If you want to force the input to be
a string, then use the optional second argument, "s"
, to force
the return value to be a string. Actually any argument will do —
just so long as there is some argument.
If the user just hits return when prompted, then input
returns an empty matrix.
This is not an built-in function. This function
is normally loaded on start-up from the input.r
file in the
standard rlib
directory. Use of the -r
option, incorrectly
setting the RLAB_LIB_DIR
environmental variable, or modifying
input.r
may make this function unavailable.
Subsections