Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Print Unknown Number of User Inputs in awk

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Print Unknown Number of User Inputs in awk
# 1  
Old 10-10-2015
Print Unknown Number of User Inputs in awk
Hello,

I am new to awk and I am trying to figure out how to print an output based on user input.

For example:

Code:
ubuntu:~/scripts$ steps="step1, step2, step3"

ubuntu:~/scripts$ echo $steps
step1, step2, step3

I am playing around and I got this pattern that I want:

Code:
ubuntu:~/scripts$ echo $steps | awk -F, '{print "Step Taken:" "\n" "- "$1 "\n" "-"$2 "\n" "-" $3}'

Step Taken:
- step1
- step2
- step3

The question is this:

What if the users input 4 or more steps (always separated by comma which I will use as a field separator just like the example above)?

How can I print an output that will include step4 or more like this?

Code:
Step Taken:
- step1
- step2
- step3
- step4
- step5

So on and so forth...

Thanks!
# 2  
Old 10-10-2015
Hello tattoostreet,

You could try following for same.
Code:
steps="step1, step2, step3, step4, step5, step7, step8, step9, step10"
echo $steps  | awk -F", " '{for(i=1;i<=NF;i++){print $i}}'

Output will be as follows.
Code:
step1
step2
step3
step4
step5
step7
step8
step9
step10

Thanks,
R. Singh
This User Gave Thanks to RavinderSingh13 For This Post:
tattoostreet
# 3  
Old 10-10-2015
This is what I need!! Thank you so much!
# 4  
Old 10-10-2015
Try also
Code:
steps=" step1, step2, step3, step4, step5, step7, step8, step9, step10"
echo "$steps" | tr ' ,' '-\n'
-step1
-step2
-step3
-step4
-step5
-step7
-step8
-step9
-step10

( this needs a leading space before step1)

---------- Post updated at 19:54 ---------- Previous update was at 19:51 ----------

or
Code:
echo "${steps//, /    
- }"
 step1
- step2
- step3
- step4
- step5
- step7
- step8
- step9
- step10

(Here, even a leading space doesn't help)
This User Gave Thanks to RudiC For This Post:
tattoostreet
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Noob question: How to check the total number of inputs entered by user?

Say I have this line: read -p "Enter 3 numbers: " num1 num2 num3; I want to write a while loop that repeatedly asks for input if the number of inputs entered is not equal to 3. I don't know the correct command to find the number of inputs entered. Help, please? (4 Replies)
Discussion started by: jejemonx
4 Replies

2. Shell Programming and Scripting

awk to find number in a field then print the line and the number

Hi I want to use awk to match where field 3 contains a number within string - then print the line and just the number as a new field. The source file is pipe delimited and looks something like 1|net|ABC Letr1|1530||| 1|net|EXP_1040 ABC|1121||| 1|net|EXP_TG1224|1122||| 1|net|R_North|1123|||... (5 Replies)
Discussion started by: Mudshark
5 Replies

3. Shell Programming and Scripting

awk code to ignore the first occurence unknown number of rows in a data column

Hello experts, Shown below is the 2 column sample data(there are many data columns in actual input file), Key, Data A, 1 A, 2 A, 2 A, 3 A, 1 A, 1 A, 1 I need the below output. Key, Data A, 2 A, 2 A, 3 A, 1 A, 1 A, 1 (2 Replies)
Discussion started by: ks_reddy
2 Replies

4. Shell Programming and Scripting

AWK print number of records, divide this number

I would like to print the number of records of 2 files, and divide the two numbers awk '{print NR}' file1 > output1 awk '{print NR}' file2 > output2 paste output1 output2 > output awl '{print $1/$2}' output > output_2 is there a faster way? (8 Replies)
Discussion started by: programmerc
8 Replies

5. Shell Programming and Scripting

print max number of 2 columns - awk

Is it possible to print max number of 2 columns - awk note: print max if the integer is positive and print min if the integer is negative input a 1 2 b 3 4 c 5 1 d -3 -5 d -5 -3 output a 2 b 4 c 5 d -5 d -5 (4 Replies)
Discussion started by: quincyjones
4 Replies

6. UNIX for Dummies Questions & Answers

How do you print the number of processes that each user is currently running in Unix?

Ok, so I know there's a way to do this, but I've been trying to find out all afternoon with no luck. I think it should print out something like this: 1 bin 2 daemon 6 duo Where the numbers on the left are the number of processes being run by the user whose name is listed on the right. Is... (4 Replies)
Discussion started by: Duo11
4 Replies

7. Shell Programming and Scripting

Please help. How to print number with 'awk'?

Dear all, I have to transform a bunch of files into a new format. how to do it with bash script, especially with 'awk' command. the original data O,0,0.2839896442,-1.1628392411,-1.5976515479 Cr,0,-0.0502858628,-0.1725974837,-0.380627632 C,0,2.4506658279,-0.476964918,0.2299298249 ... (3 Replies)
Discussion started by: liuzhencc
3 Replies

8. Shell Programming and Scripting

How do I print out lines with the same number in front using awk?

Hi, I need help in printing out the dates with the largest value in front of it using awk. 436 28/Feb/2008 436 27/Feb/2008 436 20/Feb/2008 422 13/Feb/2008 420 23/Feb/2008 409 21/Feb/2008 402 26/Feb/2008 381 22/Feb/2008 374 24/Feb/2008 360... (7 Replies)
Discussion started by: SIFA
7 Replies

9. Shell Programming and Scripting

read n number of inputs

Hello, I think its a sinple query but somehow i m stucked up here... I am trying to enter n number of inputs from the user and write them in an input file ie row wise... I tried standard commands like $echo "enter the inputs for the file" $read var1 var2 var3 var4 test1 test2... (14 Replies)
Discussion started by: er_aparna
14 Replies

10. Shell Programming and Scripting

How to print number of lines with awk ?

Can some body tell me how to print number of line from a particular file, with sed. ? Input file format AAAA BBBB CCCC SDFFF DDDD DDDD Command to print line 2 and 3 ? BBBB CCCC And also please tell me how to assign column sum to variable. I user the following command it... (1 Reply)
Discussion started by: maheshsri
1 Replies
Login or Register to Ask a Question