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Full Discussion: Checking input for being numeric and integers
Top Forums Shell Programming and Scripting Checking input for being numeric and integers Post 302355155 by mistykz on Monday 21st of September 2009 06:54:52 PM
Old 09-21-2009
Checking input for being numeric and integers
Hi, I'm trying to check to see that the arguments given to my script are both numeric and positive integers. I'm using tcsh. I figured out the positive part, but I am having trouble with the arguments being numeric and integers
I have no idea where to get started with the checking them actually being numbers...could someone point me in the right direction?
As for the integer part, this is currently what I have written:
@ int = 1
if ( $argv[1] % $int != 0 ) then
echo "not an integer"
endif

However, when this is executed, I get the error message of
if: Badly formed number.

Can if statements only take integers? If so, how can I check to see that the given argument is an integer?
 

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LEARN ABOUT DEBIAN

matho-sumsq

MATHO-SUMSQ(1)						       Mathomatic Utilities						    MATHO-SUMSQ(1)

NAME

       matho-sumsq - Find the minimum sum of the squares for integers

SYNOPSIS

       matho-sumsq [numbers]

DESCRIPTION

       This  command-line  utility  is	optionally  part of the mathomatic(1) package.	It finds the minimum number of positive integers that when
       squared and added together, equal the given number.  There is a proof that no more than 4 squares summed together are required to represent
       any positive integer.

       The  command-line  may contain positive integers to find the minimum squares of, they must be less than 2147483648 (2^31) on 32-bit systems
       or less than 9223372036854775808 (2^63) on 64-bit systems.  If "+" is appended to the given number, the program counts up  from	the  given
       number.	If the minimum number of squares is 2, this program displays all possible combinations with 2 squares for the given number, other-
       wise it just displays the first combination it finds.

       If no command-line arguments are given, the programs reads the numbers from standard input.

AUTHOR

       George Gesslein II (gesslein@mathomatic.org) at "http://www.mathomatic.org".

REPORTING BUGS

       If you find a bug, please report it to the author or at "https://launchpad.net/mathomatic".

SEE ALSO

       mathomatic(1), matho-pascal(1), matho-primes(1)

Mathomatic															    MATHO-SUMSQ(1)
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