how to find given number is integer or not in shell script

kvmreddy · 08-15-2009, 04:38 AM

can anybody help me to find supplied number to a shell script
is a number or not

catkin · 08-15-2009, 05:01 AM

You mean an argument passed to the script when it is started? As in

Code:

myscript some_argument

In that case "some_argument" would be $1 in the script and it is a string which may or may not be a number.

To advise on how to test whether it is a number, you will have to tell us what you mean by number: (un)signed integer, float (with how many decimal places?), exponential format, binary, octal, hex, maximum size ... "number" on its own is an imprecise term in computing.

pixellany · 08-15-2009, 08:05 AM

Is this homework?

Do you mean integer or number? (Your title says integer, text says number.)

Note that BASH does not deal with anything but integers.