Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

String Compariosn: Use of If and OR

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting String Compariosn: Use of If and OR
# 1  
Old 06-12-2006
String Compariosn: Use of If and OR
How to use OR with If for string comparison??

What is wrong in these two codes??

1.
if test $1 != "SO" OR $1 != "NO"
then
echo "Invalid"
else
echo "Valid"

2.
if(( $1 != "SO" || $1 != "NO" ))
then
echo "Invalid"
else
echo "Valid"

Please help?

Regards
Sandeep
# 2  
Old 06-12-2006
Code:
if [[ "$1" != "SO" || "$1" != "NO" ]] ; then
    echo "invalid"
else
    echo "valid"
fi

# 3  
Old 06-13-2006
Lightbulb
If you want to compare the entered value to "NO" and "SO", logic as per me should be:

if [ "$1" != "SO" ] && [ "$1" != "NO" ]; then
echo "INVALID"
else
echo "VALID"
fi
# using || in place of && would always display "INVALID".

You may also use
case "$1" in
"SO" | "NO") echo "VALID";;
*)
echo "INVALID";;
esac
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

awk Associative Array and/or Referring to Field by String (Nonconstant String Value)

I will start with an example of what I'm trying to do and then describe how I am approaching the issue. File PS028,005 Lexeme HRS # M # PhraseType 1(1:1) 7(7) PhraseLab 501 503 ClauseType ZYq0 PS028,005 Lexeme W # L> # BNH # M #... (17 Replies)
Discussion started by: jvoot
17 Replies

2. UNIX for Beginners Questions & Answers

Search a string and display its location on the entire string and make a text file

I want to search a small string in a large string and find the locations of the string. For this I used grep "string" -ob <file name where the large string is stored>. Now this gives me the locations of that string. Now how do I store these locations in a text file. Please use CODE tags as... (7 Replies)
Discussion started by: ANKIT ROY
7 Replies

3. Shell Programming and Scripting

Search a string in a text file and add another string at the particular position of a line

I am having a text file which is having more than 200 lines. EX: 001010122 12000 BIB 12000 11200 1200003 001010122 2000 AND 12000 11200 1200003 001010122 12000 KVB 12000 11200 1200003 In the above file i want to search for string KVB and add/replace... (1 Reply)
Discussion started by: suryanarayana
1 Replies

4. Shell Programming and Scripting

Remove lines between the start string and end string including start and end string Python

Hi, I am trying to remove lines once a string is found till another string is found including the start string and end string. I want to basically grab all the lines starting with color (closing bracket). PS: The line after the closing bracket for color could be anything (currently 'more').... (1 Reply)
Discussion started by: Dabheeruz
1 Replies

5. Shell Programming and Scripting

grep exact string from files and write to filename when string present in file

I am attempting to grep an exact string from a series of files within a directory and append that output to the filename when it is present in the file. I've been after this all day with no luck. Thanks for your help in advance :wall:. (4 Replies)
Discussion started by: JC_1
4 Replies

6. Shell Programming and Scripting

sed or awk command to replace a string pattern with another string based on position of this string

here is what i want to achieve... consider a file contains below contents. the file size is large about 60mb cat dump.sql INSERT INTO `table1` (`id`, `action`, `date`, `descrip`, `lastModified`) VALUES (1,'Change','2011-05-05 00:00:00','Account Updated','2012-02-10... (10 Replies)
Discussion started by: vivek d r
10 Replies

7. Shell Programming and Scripting

to extract string from main string and string comparison

continuing from my previous post, whose link is given below as a reference https://www.unix.com/shell-programming-scripting/171076-shell-scripting.html#post302573569 consider there is create table commands in a file for eg: CREATE TABLE `Blahblahblah` ( `id` int(11) NOT NULL... (2 Replies)
Discussion started by: vivek d r
2 Replies

8. Shell Programming and Scripting

replace (sed?) a string in file with multiple lines (string) from variable

Can someone tell me how I can do this? e.g: a=$(echo -e wert trewt ertert ertert ertert erttert erterte rterter tertertert ert) How do i replace the STRING with $a? I try this: sed -i 's/STRING/'"$a"'/g' filename.ext but this don' t work (2 Replies)
Discussion started by: jforce
2 Replies

9. Shell Programming and Scripting

search string in a file and retrieve 10 lines including string line

Hi Guys, I am trying to write a perl script to search a string "Name" in the file "FILE" and also want to create a new file and push the searched string Name line along with 10 lines following the same. can anyone of you please let me know how to go about it ? (8 Replies)
Discussion started by: sukrish
8 Replies

10. UNIX for Dummies Questions & Answers

compariosn troubles...

Hi Guys, I am trying to compare using if, but keep getting some strange results. if ; then keeps creating the file 1 if ; then does not work at all if ; then does not work if ; then does not work if ; then does not work eihter. I am using a ksh, on Solaris (9 Replies)
Discussion started by: jagannatha
9 Replies
Login or Register to Ask a Question