Hi everybody,
I want to know how can i use the command 'expr' to manipulate float number , i have a shell bash and when (for example) i do:
y1=`expr \( 1/ 16 \)`
it returns 0
and if i do
y1=`expr \( 1.6 / 16 \)`
it returns non numeric argument.
is there another command for mathematic... (4 Replies)
I need to accept a number of arguments at command line and print it in reverse order
i use eval `echo x=$1` to capture the argument
#! /bin/sh
counter=0
while
do
eval `echo x=$1`
arg$counter=$x
counter=`expr $counter + 1`
shift
done
but the error keeps... (1 Reply)
i got a file called Marks
The format of Marks is:
12345678 5 7
23456789 7 9 3
What can i do with a loop, read expr and echo command to produce a new file like below:
12345678:12
23456789:20
and also when we adding fewer than 3 value with expr, we need to change any null value for... (13 Replies)
Hi all,
i am facing the error "expr: non-numeric argument" when i use the expr command.
Following is the expression which i want to execute
HR=$(echo `date +%H`)
MIN=$(echo `date +%M`)
TOT_MIN=`expr "$HR" \* 60+$MIN` | bc
echo $TOT_MIN
Here I am being reported with the error expr:... (6 Replies)
i wrote this simple shell script
#!/bin/bash
read N1
read N2
expr $N1 + $N2
it work fine in bash and i add it on xinetd for some test but when i try to use in with telnet i got this error :
ehsan@debian:~$ telnet 192.168.1.4 1234
Trying 192.168.1.4...
Connected to 192.168.1.4.... (14 Replies)
Hi,
I am trying to execute a simple script as below to compare a value from a file and copy that line based on a condition.
while read line
do
code_check = `expr substr "$line" 6 1`
if ; then
echo "${line}" >> /temp/bill/push_updated.dat
else
echo "line ignored"
fi
done <... (8 Replies)
Hi,
I am new to shell/bash script. I am trying to run below script
#!/bin/bash
a=0
b=10
if
then
echo "a is equal to be"
else
echo "a is not equal to be"
fi
MAX=10
while
do
echo $a
a='expr $a + 1'
done (1 Reply)
This is my code.... It works correct, but does not work with 4 and 5. My program is about finding average. so when i run 4 5 it gives me error "expr: non-integer argument".
But when i say sh average 45 67 it works. Whats wrong?how to fix it?
sum=0
n=0
if
then
for i in $*
do
if
... (2 Replies)
The username is of the format : 123456789110000-1234@something.com
With this below TCL procedure, I am trying add first and Sec Id and get third Id.
I checked in online compiler and it seems to work and add. However, when I am running this in my lab, I get error as "integer value too large to... (3 Replies)
Hi,
I tried to look up the issue i'm experiencing, but i'm confused what's wrong with my script.
After executing the script I'm getting the following error
expr: non-numeric argument
syntax error on line 1, teletype
After some research, it seems that the problem relates to bc.
I have... (1 Reply)
Discussion started by: nms
1 Replies
LEARN ABOUT PHP
round
ROUND(3) 1 ROUND(3)round - Rounds a floatSYNOPSIS
float round (float $val, [int $precision], [int $mode = PHP_ROUND_HALF_UP])
DESCRIPTION
Returns the rounded value of $val to specified $precision (number of digits after the decimal point). $precision can also be negative or
zero (default).
Note
PHP doesn't handle strings like "12,300.2" correctly by default. See converting from strings.
PARAMETERS
o $val
- The value to round
o $precision
- The optional number of decimal digits to round to.
o $mode
- Use one of the following constants to specify the mode in which rounding occurs.
+--------------------+---------------------------------------------------+
| Constant | |
| | |
| | Description |
| | |
+--------------------+---------------------------------------------------+
| | |
| PHP_ROUND_HALF_UP | |
| | |
| | Round $val up to $precision decimal places away |
| | from zero, when it is half way there. Making 1.5 |
| | into 2 and -1.5 into -2. |
| | |
| | |
|PHP_ROUND_HALF_DOWN | |
| | |
| | Round $val down to $precision decimal places |
| | towards zero, when it is half way there. Making |
| | 1.5 into 1 and -1.5 into -1. |
| | |
| | |
|PHP_ROUND_HALF_EVEN | |
| | |
| | Round $val to $precision decimal places towards |
| | the next even value. |
| | |
| | |
|PHP_ROUND_HALF_ODD | |
| | |
| | Round $val to $precision decimal places towards |
| | the next odd value. |
| | |
+--------------------+---------------------------------------------------+
RETURN VALUES
The rounded value
EXAMPLES
Example #1
round(3) examples
<?php
echo round(3.4); // 3
echo round(3.5); // 4
echo round(3.6); // 4
echo round(3.6, 0); // 4
echo round(1.95583, 2); // 1.96
echo round(1241757, -3); // 1242000
echo round(5.045, 2); // 5.05
echo round(5.055, 2); // 5.06
?>
Example #2
$mode examples
<?php
echo round(9.5, 0, PHP_ROUND_HALF_UP); // 10
echo round(9.5, 0, PHP_ROUND_HALF_DOWN); // 9
echo round(9.5, 0, PHP_ROUND_HALF_EVEN); // 10
echo round(9.5, 0, PHP_ROUND_HALF_ODD); // 9
echo round(8.5, 0, PHP_ROUND_HALF_UP); // 9
echo round(8.5, 0, PHP_ROUND_HALF_DOWN); // 8
echo round(8.5, 0, PHP_ROUND_HALF_EVEN); // 8
echo round(8.5, 0, PHP_ROUND_HALF_ODD); // 9
?>
Example #3
$mode with precision examples
<?php
/* Using PHP_ROUND_HALF_UP with 1 decimal digit precision */
echo round( 1.55, 1, PHP_ROUND_HALF_UP); // 1.6
echo round( 1.54, 1, PHP_ROUND_HALF_UP); // 1.5
echo round(-1.55, 1, PHP_ROUND_HALF_UP); // -1.6
echo round(-1.54, 1, PHP_ROUND_HALF_UP); // -1.5
/* Using PHP_ROUND_HALF_DOWN with 1 decimal digit precision */
echo round( 1.55, 1, PHP_ROUND_HALF_DOWN); // 1.5
echo round( 1.54, 1, PHP_ROUND_HALF_DOWN); // 1.5
echo round(-1.55, 1, PHP_ROUND_HALF_DOWN); // -1.5
echo round(-1.54, 1, PHP_ROUND_HALF_DOWN); // -1.5
/* Using PHP_ROUND_HALF_EVEN with 1 decimal digit precision */
echo round( 1.55, 1, PHP_ROUND_HALF_EVEN); // 1.6
echo round( 1.54, 1, PHP_ROUND_HALF_EVEN); // 1.5
echo round(-1.55, 1, PHP_ROUND_HALF_EVEN); // -1.6
echo round(-1.54, 1, PHP_ROUND_HALF_EVEN); // -1.5
/* Using PHP_ROUND_HALF_ODD with 1 decimal digit precision */
echo round( 1.55, 1, PHP_ROUND_HALF_ODD); // 1.5
echo round( 1.54, 1, PHP_ROUND_HALF_ODD); // 1.5
echo round(-1.55, 1, PHP_ROUND_HALF_ODD); // -1.5
echo round(-1.54, 1, PHP_ROUND_HALF_ODD); // -1.5
?>
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 5.3.0 | |
| | |
| | The $mode parameter was introduced. |
| | |
| 5.2.7 | |
| | |
| | The inner workings of round(3) was changed to |
| | conform to the C99 standard. |
| | |
+--------+---------------------------------------------------+
SEE ALSO ceil(3), floor(3), number_format(3).
PHP Documentation Group ROUND(3)