how to check user input bash shell

[CheeSen]

can i know how to check user input ? And make sure only alphabetic characters and spaces .
any idea?

[mssever]

can i know how to check user input ? And make sure only alphabetic characters and spaces .
any idea?

if [[ $user_input =~ ^[a-zA-Z ]+$ ]]; then
echo "Good user. Here's a cookie."
else
echo "You didn't enter what I told you to enter. Go to your room."
fiNote that this is Bash-specific. If you call your script with sh, it will fail.

[ghostdog74]

check the bash link in the sig. all the questions that you have posted in other forums including this one can be found in that link.