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how to ignore case

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# 1  
Old 09-15-2009
Power how to ignore case
Hi All,

The means I use to ignore case, as an example is the following snippet:
It should accept any oof the following y|Y|YES|Yes|n|N|NO|No

echo "Enter Y/N to continue: "
read choice;
# 2  
Old 09-15-2009
The best way to ignore case is to convert the user input to upper case (or lower case - your choice).

Try this:

Code:
$ choice="yes"

$ echo ${choice} | tr "[a-z]" "[A-Z]"
YES
$

HTH, Smilie


Regards,

Praveen
# 3  
Old 09-15-2009
typeset -u var # convert to uppercase no matter what the input is

# checks for all possible input combos
echo $var | sed 's/^YES$/valid/
s/^NO$/valid
s/^Y$/valid
s/$N$/valid'
# 4  
Old 09-15-2009
Code:
$ if echo 'yes' | egrep -qi '^(yes|y|no|n)$';then echo "correct";fi
correct

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