LinuxQuestions.org - Checking for Alphabets

- Programming (http://www.linuxquestions.org/questions/programming-9/)

- - Checking for Alphabets (http://www.linuxquestions.org/questions/programming-9/checking-for-alphabets-784667/)

Checking for Alphabets

Code:

echo -n "read this also:"

read NewAuthor





if [ -z $( echo "$NewAuthor" | tr -d '[[:digit:]]' ) ] ; then

echo "its a digit"

else

echo "something else"

fi

Hey guys , i am trying to do a search to check if the input is using alphabets and nothing else. I tried using [[:digit:]] and [[:alpha:]] but none seems to work

When i use digit, it read 22.k as alphabet and not as a wrong syntax.
For alpha , it does not allow me to input data which has spaces such as " hello world". how can i solve this issue.

Assuming bash:

Code:

if [[ $testvar =~ [[:digit:]] ]]; then

     echo "String contains numbers."

else

     echo "No numbers found."

fi

Of course, just using [[:digit:]] only won't match non-alphabetical characters either, like punctuation marks or foreign scripts. You'll have to modify it for that.