Korn shell only. Same as in the Bourne shell, except that the Korn
supports the options below as well as the ? syntax for prompting.
If a variable is followed by ?
string is displayed
as a user prompt. If no variables are given, input is stored in the
Read from the output of a |& coprocess.
Raw mode; ignore \ as a line continuation character.
Save input as a command in the history file.
Read input from file descriptor
n (default is 0).
Prompt yourself to enter two temperatures:
read n1?"High low: " n2High low: