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Top Forums Shell Programming and Scripting How to Check given string is number in shell script? Post 302324926 by rakeshawasthi on Friday 12th of June 2009 08:36:53 AM
Old 06-12-2009
Code:
a=`echo $REQUEST_ID| tr -d "[0-9]`
if [[ -z $a ]]; then it would be number
[

]

-----Post Update-----

Quote:
Originally Posted by balajiora
How to assign this output into variable

I have tried the below option

X=`echo "$REQUEST_ID" | awk '$0 ~/[^0-9]/ { print TRUE }'`

echo $X

its printing empty string.

Regards
BS
put quotes i.e. " around TRUE
 

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ECHO(1) 						    BSD General Commands Manual 						   ECHO(1)

NAME
echo -- write arguments to the standard output SYNOPSIS
echo [-n] [string ...] DESCRIPTION
The echo utility writes any specified operands, separated by single blank (' ') characters and followed by a newline (' ') character, to the standard output. The following option is available: -n Do not print the trailing newline character. This may also be achieved by appending 'c' to the end of the string, as is done by iBCS2 compatible systems. Note that this option as well as the effect of 'c' are implementation-defined in IEEE Std 1003.1-2001 (``POSIX.1'') as amended by Cor. 1-2002. Applications aiming for maximum portability are strongly encouraged to use printf(1) to sup- press the newline character. Some shells may provide a builtin echo command which is similar or identical to this utility. Most notably, the builtin echo in sh(1) does not accept the -n option. Consult the builtin(1) manual page. EXIT STATUS
The echo utility exits 0 on success, and >0 if an error occurs. SEE ALSO
builtin(1), csh(1), printf(1), sh(1) STANDARDS
The echo utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'') as amended by Cor. 1-2002. BSD
April 12, 2003 BSD
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