05-04-2011
How to check for a Numeric Value?
Using shell,
I have a variable, how can I check that variable for a numeric value such as "41.0"? My program needs to do one things if the numeric value is found, and another if something else such as a string of letter is found. is there a specific character that denotes a numeral? The numerals will always be a decimal number rounded to the tenth as above. Some numerals could be five digits though, including the decimal, such as "376.0". Can anyone help me?
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi Folks,
I'm using bash script. I would like to check whether input is a number or not.(Only positive numbers).. if space or non numeric is entered, it should say "invalid input". pls help..
thanks in adv.
Br///
Vijay. (1 Reply)
Discussion started by: Vijayakumarpc
1 Replies
2. Shell Programming and Scripting
Hi All,
How do i modify the below script such that if the input is numeric, it will give the numeric digit, else it will ouput "0"
echo "xxx" | awk '/^+$/' (6 Replies)
Discussion started by: Raynon
6 Replies
3. Shell Programming and Scripting
if test $b -ne
then
echo "\n\n\n\tPassword reset has been done successfully"
else
echo "\n\n\n\tAn error occurred"
fi
i want to check whether $b is non-numeric so how to do that? (3 Replies)
Discussion started by: sachin.gangadha
3 Replies
4. Shell Programming and Scripting
Below is the abstract of the script which is working fine.
if ]
then
error_process "Invalid month format."
return 1
fi
I am doing validation for month and it errors if the value is > 12 or < 0. In addition, I want to add another condition to error if it... (2 Replies)
Discussion started by: sony_dada
2 Replies
5. Programming
Hi,
how to check the given string is numeric or not , without converting ( using strtol...).
for ex: if string is C01 - non-numeric data
if string is 001 - numeric data
TIA (11 Replies)
Discussion started by: knowledge_gain
11 Replies
6. Shell Programming and Scripting
Hi All,
I would like to convert my below csh script to Perl.
Can any expert help ?
# To check for numeric input
set tested1 = `echo "$tested"| awk '/^+$/'`;
# To remove un-neccessary zeros
set tested2 = `echo "$tested"|awk '{print $0+0}'`; (3 Replies)
Discussion started by: Raynon
3 Replies
7. Shell Programming and Scripting
How to check if the file contains only numeric values.
I don't want to read entire file it eats lot of cpu
Or any way which consumes less memory n cpu..
Please suggest
-S (2 Replies)
Discussion started by: sunilmenhdiratt
2 Replies
8. Shell Programming and Scripting
Hi,
I want to know, how we find out if a column is having a numeric value or not.
For Example if we have a csv file as
ASDF,QWER,GHJK,123,FGHY,9876
GHTY,NVHR,WOPI,623,HFBS,5386
we need to find out if the 4th and 6th column has muneric value or not.
Thanks in advance
Keerthan (9 Replies)
Discussion started by: keerthan
9 Replies
9. Shell Programming and Scripting
I checked all the previous threads related to this and tried this.
My input is all numbers or decimals greater than zero everytime.
I want to check the same in the korn shell script.
Just validate the string to be numeric.
This is what I am doing.
var="12345"
if ) -o "$var" !=... (14 Replies)
Discussion started by: megha2525
14 Replies
10. Shell Programming and Scripting
Hello there, find below for my code first:
$pdp_asaba=`cat /tmp/temp_total | grep asaba | sed 's/*//g'`
if ]]
then pdp_asaba=0
fi
$pdp_abuja=`cat /tmp/temp_total | grep abuja | sed 's/*//g'`
if ]]
then pdp_abuja=0
fi
$pdp_ojota=`cat /tmp/temp_total | grep ojota | sed 's/*//g'`
if ... (3 Replies)
Discussion started by: infinitydon
3 Replies
LEARN ABOUT OPENSOLARIS
extended_to_decimal
floating_to_decimal(3C) Standard C Library Functions floating_to_decimal(3C)
NAME
floating_to_decimal, single_to_decimal, double_to_decimal, extended_to_decimal, quadruple_to_decimal - convert floating-point value to dec-
imal record
SYNOPSIS
#include <floatingpoint.h>
void single_to_decimal(single *px, decimal_mode *pm,
decimal_record *pd, fp_exception_field_type *ps);
void double_to_decimal(double *px, decimal_mode *pm,
decimal_record *pd, fp_exception_field_type *ps);
void extended_to_decimal(extended *px, decimal_mode *pm,
decimal_record *pd, fp_exception_field_type *ps);
void quadruple_to_decimal(quadruple *px, decimal_mode *pm,
decimal_record *pd, fp_exception_field_type *ps);
DESCRIPTION
The floating_to_decimal functions convert the floating-point value at *px into a decimal record at *pd, observing the modes specified in
*pm and setting exceptions in *ps. If there are no IEEE exceptions, *ps will be zero.
If *px is zero, infinity, or NaN, then only pd->sign and pd->fpclass are set. Otherwise pd->exponent and pd->ds are also set so that
(sig)*(pd->ds)*10**(pd->exponent)
is a correctly rounded approximation to *px, where sig is +1 or -1, depending upon whether pd->sign is 0 or -1. pd->ds has at least one
and no more than DECIMAL_STRING_LENGTH-1 significant digits because one character is used to terminate the string with a null.
pd->ds is correctly rounded according to the IEEE rounding modes in pm->rd. *ps has fp_inexact set if the result was inexact, and has
fp_overflow set if the string result does not fit in pd->ds because of the limitation DECIMAL_STRING_LENGTH.
If pm->df == floating_form, then pd->ds always contains pm->ndigits significant digits. Thus if *px == 12.34 and pm->ndigits == 8, then
pd->ds will contain 12340000 and pd->exponent will contain -6.
If pm->df == fixed_form and pm->ndigits >= 0, then the decimal value is rounded at pm->ndigits digits to the right of the decimal point.
For example, if *px == 12.34 and pm->ndigits == 1, then pd->ds will contain 123 and pd->exponent will be set to -1.
If pm->df == fixed_form and pm->ndigits< 0, then the decimal value is rounded at -pm->ndigits digits to the left of the decimal point, and
pd->ds is padded with trailing zeros up to the decimal point. For example, if *px == 12.34 and pm->n digits == -1, then pd->ds will contain
10 and pd->exponent will be set to 0.
When pm->df == fixed_form and the value to be converted is large enough that the resulting string would contain more than DECI-
MAL_STRING_LENGTH-1 digits, then the string placed in pd->ds is limited to exactly DECIMAL_STRING_LENGTH-1 digits (by moving the place at
which the value is rounded further left if need be), pd->exponent is adjusted accordingly and the overflow flag is set in *ps.
pd->more is not used.
The econvert(3C), fconvert(3C), gconvert(3C), printf(3C), and sprintf(3C) functions all use double_to_decimal().
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
econvert(3C), fconvert(3C), gconvert(3C), printf(3C), sprintf(3C), attributes(5)
SunOS 5.11 7 Jun 2005 floating_to_decimal(3C)