In ksh I am trying to ensure that user inputs are integers otherwise redisplay prompt with the following code;
Code:
a=0
b=0
c=0
read b?"Please enter a number: "
read c?"Please enter another number: "
while [ $b != [0-9] ] && [ $c != [0-9] ]; do
read b?"Not a number. Please enter a number: "
read c?"Not a number. Please enter another number: "
done
a=`expr b \\* c`
echo $a
...but the while loop is not evaluating, I am getting an error such as (assuming l and p were entered into the prompt)
Code:
myscript[50]: l: bad number
And when the entries are actual numbers, it still generates an error such as;
myscript[50]: [0-9]: syntax error
...so it does seem there is a syntax error with the while loop. Any idea?
Last edited by techieg; 05-05-2013 at 03:03 PM..
Reason: code tags
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LEARN ABOUT XFREE86
suspend
suspend(1) User Commands suspend(1)NAME
suspend - shell built-in function to halt the current shell
SYNOPSIS
sh
suspend
csh
suspend
ksh
suspend
DESCRIPTION
sh
Stops the execution of the current shell (but not if it is the login shell).
csh
Stop the shell in its tracks, much as if it had been sent a stop signal with ^Z. This is most often used to stop shells started by su.
ksh
Stops the execution of the current shell (but not if it is the login shell).
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO csh(1), kill(1), ksh(1), sh(1), su(1M), attributes(5)SunOS 5.10 15 Apr 1994 suspend(1)