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Extracting first character from a user response

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# 1  
Old 10-18-2009
Extracting first character from a user response
I am using the following code in a CShell script to get a yes/no response from the user:

echo ""
echo -n "Do you want to archive your main level directory? <y> or n: "
set main_answer = $<


Is there a way to extract the first letter from the user's response and then perhaps convert that letter to lower case?

Thanks,
Paul Hudgens
Denver
# 2  
Old 10-18-2009
As I've yet to find a useful case for the C-shells existence...

Code:
#!/bin/csh
set main_answer = $<

echo $main_answer | cut -c1 | tr '[a-z]' '[A-Z]'

# 3  
Old 10-19-2009
Extracting first character from a user response
Scott,
The:
Code:
echo $main_answer | cut -c1 | tr '[a-z]' '[A-Z]'

code works on both Unix and Linux, but I'm having difficulty capturing that first character of the user response in a variable that can be checked later. I've tried serveral different combinations, but when I echo $main_answer to the screen, I always get the full response entered at the prompt. Thanks for any help,
Paul Hudgens
# 4  
Old 10-19-2009
Code:
#!/bin/csh
set main_answer = $<

set short_answer=`echo $main_answer | cut -c1 | tr '[a-z]' '[A-Z]'`
echo $short_answer

# 5  
Old 10-19-2009
Extracting first character from a user response
This works - thanks for the help.

I had tried exactly what you show, only I re-used main_answer instead of a new variable (in this case short_answer). Apparently that doesn't work in CShell like it does in other languages.

Thanks,
Paul Hudgens
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