read the ENTER key


 
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# 1  
Old 11-27-2006
Lightbulb read the ENTER key

Hi ,

I do the following :

]echo "Do you want to say yes or no ?(y/n)[n]:\c"
read ans


here 'n' is the default value.that means if the user press ENTER key then it should be 'n' .
Now how do i know that the user has pressed ENTER key.What will be stored in my variable 'ans'.
# 2  
Old 11-27-2006
Quote:
Originally Posted by sars
here 'n' is the default value.that means if the user press ENTER key then it should be 'n' .
No
Quote:
Originally Posted by sars
Now how do i know that the user has pressed ENTER key.What will be stored in my variable 'ans'.
ans will contain what you typed until the enter key was pressed. If you only press enter, then that variable will be empty.
To do what you want, you need to do something like:
Code:
echo "Do you want to say yes or no ?(y/n)[n]:\c"
read ans
case $ans in
n|"")
  echo no;;
y)
  echo yes;;
*)
  echo other;;
esac


Last edited by grial; 11-27-2006 at 08:04 AM..
# 3  
Old 11-27-2006
I am not sure

"^m" would be stored in variable if you are using Linux
# 4  
Old 11-27-2006
I've modified the code I posted before, have a look at it now. It works in Linux (bash) also.
What I meant with empty was "no printable chars", I'm sorry Smilie
# 5  
Old 11-27-2006
I'm not sure how literally sars meant the question. But here is an interesting thread about reading a single keystroke from a shell script.
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