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Shell Programming and Scripting

Execution Problems with if statements

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# 1  
Old 12-20-2011
Execution Problems with if statements
Hi all,

I habe a file called test.log, which contain following data :

0.0
Code:
0.1
0.1
0.1
0.1
0.2
0.3
0.3
0.4
0.4
0.6
8.7
8.8
17.2

I want to show the data which gater than 9.0 But my script not working.
Script :

Code:
#!/bin/bash
ps -eo pcpu |grep-v"%CPU"> test.log
v=9.0
exec<test.log
while read line
do
if expr $line \> $v >/dev/null ; then
echo$line
fi
done

Last edited by Franklin52; 12-20-2011 at 06:29 AM.. Reason: Please use code tags for code and data samples, thank you
# 2  
Old 12-20-2011
Simplest Smilie
Code:
$ nawk '$0>9' infile
17.2

# 3  
Old 12-20-2011
Code:
if expr $line \> $v >/dev/null ; then

You don't need expr to do a numeric comparison.
Code:
if [ $line -gt $v ]; then

or
Code:
if [[ $line > $ v ]]; then

EDIT: Except that won't work for floats. Never mind me... Smilie
# 4  
Old 12-20-2011
Quote:
Originally Posted by CarloM
Code:
if expr $line \> $v >/dev/null ; then

You don't need expr to do a numeric comparison.
Code:
if [ $line -gt $v ]; then

or
Code:
if [[ $line > $ v ]]; then



EDIT: Except that won't work for floats. Never mind me... Smilie

It's not working properly.
# 5  
Old 12-20-2011
Code:
while read x; do res=`echo "$x > 9.0" | bc`; [ $res -eq 1 ] && echo $x; done < test.log

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