multiple condition in if

Shell Programming and Scripting
1

All,

My environment is Red Hat Enterprise Linux 5.

I am using the following condition --

if [[ $z -gt 5 -a $z -lt 7 ] -0 [ $y == 'VALID' ]]

above command is not working. It is telling that -a unexpected.

Please help me

2

You're getting your ]'s and ]]'s mixed up, if you start with [[ always end with ]], they're not nesting brackets.

3

Hi

I tried with following combinations,

if [[ $z -gt 5 -a $z -lt 7 ] -o [ $y == 'VALID' ]]

if [ $z -gt 5 -a $z -lt 7 -o $y == 'VALID' ]

if [ $z -gt 5 ]-a [ $z -lt 7 ] -0 [ $y == 'VALID' ]

nothing is working fine.

Can you please provide the correct one

4

How about ...

if ([ $z -gt 5 ] && [ $z -lt 7 ]) || [ $y == 'VALID' ]
5

still not working..

6

Try this. The condition is the same each time, we just change the data for each test.

z=6
y="VALID"
if [ \( ${z} -gt 5 -a ${z} -lt 7 \) -o \( "${y}" = "VALID" \) ]
then
      echo "TRUE: ${z} ${y}"
else
      echo "FALSE: ${z} ${y}"
fi


z=5
y="VALID"
if [ \( ${z} -gt 5 -a ${z} -lt 7 \) -o \( "${y}" = "VALID" \) ]
then
      echo "TRUE: ${z} ${y}"
else
      echo "FALSE: ${z} ${y}"
fi

z=6
y="ORANGE"
if [ \( ${z} -gt 5 -a ${z} -lt 7 \) -o \( "${y}" = "VALID" \) ]
then
      echo "TRUE: ${z} ${y}"
else
      echo "FALSE: ${z} ${y}"
fi

z=4
y="ORANGE"
if [ \( ${z} -gt 5 -a ${z} -lt 7 \) -o \( "${y}" = "VALID" \) ]
then
      echo "TRUE: ${z} ${y}"
else
      echo "FALSE: ${z} ${y}"
fi



./scriptname 
TRUE: 6 VALID
TRUE: 5 VALID
TRUE: 6 ORANGE
FALSE: 4 ORANGE
7

:confused:

[house@leonov] more test.bash
#! /bin/bash

if ([ $1 -gt 5 ] && [ $1 -lt 7 ]) || [ $2 == 'VALID' ]
then
  echo "true"
else
  echo "false"
fi

exit 0

[house@leonov] sh test.bash 5 VALID
true
[house@leonov] sh test.bash 6 VALID
true
[house@leonov] sh test.bash 6 ORANGE
true
[house@leonov] sh test.bash 4 ORANGE
false
8

Lateral thought. Maybe you were just trying to validate $z ?

for z in 1 2 3 4 5 6 7 8 9
do
        if [ ${z} -gt 5 -a ${z} -lt 7 ]
        then
                y="VALID"
        else
                y="INVALID"
        fi
        echo "${z} : ${y}"
done


./scriptname
1 : INVALID
2 : INVALID
3 : INVALID
4 : INVALID
5 : INVALID
6 : VALID
7 : INVALID
8 : INVALID
9 : INVALID
9

All,

I used methyl's code and is working fine. Thanks a lot for your inputs.

10

Psychic or what?

Clarify the problem and the solution will become clear.
(Methyl Sep 2009)

11

Methyl,

I said that I used your suggestion (if [ \( ${z} -gt 5 -a ${z} -lt 7 \) -o \( "${y}" = "VALID" \) ]) and it is working fine.
For that you are telling me psychic and all.
Mind your words in the forum.