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Top Forums Shell Programming and Scripting What can i do to check that the input is all alphabet.. ? Post 14123 by XXXXXXXXXX on Monday 28th of January 2002 01:55:55 PM
Old 01-28-2002
Quote:
Originally posted by Jimbo
expr "$answer" : "[A-Za-z]*$"

Above command will return non-zero (length of answer) if it consists of only upper/lower letters. To restrict it to only lowercase or only uppercase, just remove A-Z or a-z. As coded, does not allow for spaces in answer.

You can either capture the output in a variable, then test the variable, or you can nest the above command directly within an if-statement.
thanks
XXXXXXXXXX
 
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BASE64(1)							   User Commands							 BASE64(1)

NAME
base64 - base64 encode/decode data and print to standard output SYNOPSIS
base64 [OPTION]... [FILE] DESCRIPTION
Base64 encode or decode FILE, or standard input, to standard output. -d, --decode decode data -i, --ignore-garbage when decoding, ignore non-alphabet characters -w, --wrap=COLS wrap encoded lines after COLS character (default 76). Use 0 to disable line wrapping --help display this help and exit --version output version information and exit With no FILE, or when FILE is -, read standard input. The data are encoded as described for the base64 alphabet in RFC 3548. When decoding, the input may contain newlines in addition to the bytes of the formal base64 alphabet. Use --ignore-garbage to attempt to recover from any other non-alphabet bytes in the encoded stream. AUTHOR
Written by Simon Josefsson. REPORTING BUGS
Report base64 bugs to bug-coreutils@gnu.org GNU coreutils home page: <http://www.gnu.org/software/coreutils/> General help using GNU software: <http://www.gnu.org/gethelp/> Report base64 translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
The full documentation for base64 is maintained as a Texinfo manual. If the info and base64 programs are properly installed at your site, the command info coreutils 'base64 invocation' should give you access to the complete manual. GNU coreutils 8.5 February 2011 BASE64(1)

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