By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I doubt that the "if - else" logic can be incorporated in one substitution command without saving the intermediate data length of the match for instance.

It doesn't mean you can't do it easily, though. For instance:. The r label basically says: try to do substitution, then goto r if found something to substitute. See more on flow control in sed here. Use two substitute commands: the first one will search for one digit and will insert two zeroes just before, and the second one will search for a number with two digits and will insert one zero just before.

I find the following sed approach to pad an integer number with zeroes to 5 n digits quite straighforward:.

60 series landcruiser fuel economyWhen there happen to be more than 5 n digits, this approach behaves the usual way -- nothing is padded or trimmed. Learn more. Add leading 0 in sed substitution Ask Question. Asked 7 years, 7 months ago. Active 1 year, 2 months ago.

**Using AWK to format output**

Viewed 7k times. Something like: if one digit then two leading 0 elif two digits then one leading 0 Regards. Artur Szymczak Artur Szymczak 77 1 1 silver badge 5 5 bronze badges.

Active Oldest Votes. Lev Levitsky Lev Levitsky Artur I've added a brief explanation and a link, feel free to ask.

### Shell Programming and Scripting

What about 12, and You are right that the answer isn't applicable to your example, as each would be treated as two numbers instead of one.

Birei Birei Thor Thor 35k 7 7 gold badges 93 93 silver badges bronze badges. This might work for you GNU sed : echo '1. Input: 0 1 12 Output: Blaf Blaf 6 6 silver badges 10 10 bronze badges. Maksym Boyko Maksym Boyko 1 1 1 bronze badge. Sign up or log in Sign up using Google. Sign up using Facebook.

Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

It only takes a minute to sign up. Trying to find how to replace a leading zero with white space in SED. Attempting to get day of month and replace with space to filter some data that I am screen scraping. You don't have to escape space in sed command, just use double quote in echo command to avoid word splitting :. Sign up to join this community. The best answers are voted up and rise to the top.

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Home Questions Tags Users Unanswered. How to replace a leading zero with white space in SED? Ask Question. Asked 5 years, 10 months ago. Active 5 years, 10 months ago. Viewed 2k times. Gilles 'SO- stop being evil' k gold badges silver badges bronze badges.

Quote your expansion on the echo, otherwise it strips whitespace. Those make date return a space-padded field. Active Oldest Votes. GautamSomani: The pattern only match at start of line, so it's not a problem. But it is still not necessary to use g here, removed it! Will delete my comment. Sign up or log in Sign up using Google.

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Is lancaster tactical supply legitSign up using Email and Password.Post a Comment. Tuesday, May 29, Right pad a string or a number with zero.

In an earlier article, we saw the different ways in which we can left pad a string with zeros. In this, let us see the different ways in which we can right pad a string or a number with zeros. Assuming a number, saywhich we want to right pad to 7 digits with zeros: 1.

This sed way had been discussed in example 4 of left padding a string as well. The same explanation holds good here. This is because once the length of the number reaches 7, sed quits. To understand better, put 7 in place of 6 and check the result. Using awka for loop is run till the length of the variable becomes 7. During every iteration, the number is appended a zero.

A typical shell script. Approach is same as the awk approach.

Citadel forged with fire best spellsA while loop is run till the length becomes 7. The perl way, a little interesting.

Site inspection report format in wordThe -1 is needed since the length function also takes the newline into account. Another way using perl. Keep multiplying the number by 10 till the length reaches 7. No comments:. Newer Post Older Post Home.

Subscribe to: Post Comments Atom.What a classic. Hats off really. Helped me save so much of time. God Bless. Thanks for providing so many different ways to accomplish the task - very helpful! Thursday, April 26, How to zero pad a number or a variable? In this article, we will see the different ways in which we can do zero padding of a number or a variable or in other words, to put leading zeros to a number. Let us assume a variable "x" whose value is 23, and try to zero pad it to a length of 4.

The format specifier 4d will align the variable towards the right by 4 digits. By putting 04d, the same number will be zero padded 4 places to the right.

Using typeset command: Another internal command typeset. Earlier, we had seen the usage of typeset in arithmetic operations. So, just declare a variable using typeset with the required padding as shown below. Using sed : This is my favorite, and little tricky too. This is the same way as we had used in the sed option of our earlier article joining all lines in a file. The loop condition here is till the length reaches 4 initial dot. Till 4 character limit is reached, we keep adding 0 in the beginning of the variable.

The sed works like this: match any character. When the match fails which means when the count of characters excluding the first character exceeds 3, stop it and hence we get the number zero padded by 4. Shell Script solution : The traditional way of doing using the while loop. Till it reaches, a '0' is put in the beginning of the variable. Keda December 7, at PM. Unknown June 17, at PM. Newer Post Older Post Home. Subscribe to: Post Comments Atom.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

It only takes a minute to sign up. I am having trouble getting my sed syntax down to add a varying number of leading zeros to a numeric organizational scheme. The strings I am operating on appear like. However, What I am looking for is something to zero-fill up to 2 digits in fields 2 and 3 and 3 digits in field 4 so that all items are of a standard length at [].

For the life of me I cannot figure even how to modify the boundary to include the parameters necessary to snap to only numerals following a period. It is a foregone conclusion that I need to really learn sed and all of its complexities. I am working on that, but expect that this particular statement will continue to cause me trouble for a while.

Any help would be greatly appreciated. EDIT: I've figured out a way This statement seems to do what I am looking for, but there has got to be a more elegant way to do this. Also, syntactically this will cause problems if a similar number format appears in the text Solved Thank you all for your help here.

I initially solved the problem with the answer I accepted below. I've sense moved the solution into Python as a part of a larger solution leveraging the sort below:. You haven't specifically asked for a perl solution but here's one anyway.

Personally I think this is a little easier to read, especially when broken into several lines. And here is the perl script broken out and commented the -n flag puts an implicit while read; do The method used is here is to look at the neighborhoods of the numerics and take action based on that. So, the 2nd and 3rd numbers see a dot on both sides whilst the 4th numeric sees dot on it's left and a comma to it's right.

OTOH, for the 4th num, the padding is 3. Sign up to join this community. The best answers are voted up and rise to the top.

## How to pad string with zeroes & right-justify in bash using sed

Home Questions Tags Users Unanswered. Implementing an extended regexp to add a variable number of leading zeros based on position in a string Ask Question. Asked 2 years, 9 months ago. Active 2 years, 9 months ago.

Viewed times. The strings I am operating on appear like 1. Strangely, reversing the string, applying trailing zeros, and then reversing the result may achieve your aim more easily. Using printf or a printf call within Awk may be more straightforward.

Wildcard - point well taken.Today's Posts. Quick Links. Search Forums. Show Threads. Show Posts. Shell Programming and Scripting. Pad zeros to a number. Registered User. Join Date: Aug Originally Posted by anumkoshy.

Join Date: Apr Code :. Join Date: Feb If you use ksh, you can use typeset Code :. Join Date: Jul Hello All, I have a requirement in which i will be given a sql query as input in a file with dynamic number of columns.

For example some times i will get 5 columns, some times 8 columns etc up to 20 columns. So my requirement is to generate a output query which will have 20 columns all the How to pad with leading zeros for current time?

I'm using cygwin bash to submit scheduled tasks kinda like cron jobs in windows and the following script is giving me grief. I need to format the current time with leading zeros before 10AM for the hour field.

Pad Zeros at the end. Is it possible by using awk to remove leading zeros for a hex number? How to right pad with zeros using sprintf? I need to right-pad with zeros a string by using s printf. Removing Zeros in front of a number. Hi All, I would like to trim the following input. My condition is as long as there's a zero on the left of the number, remove the zeros.

Can anybody help me by using sed or awk? Hi, I'm on a sunos SVR4. Thanks 5 Replies. HPUX I have a keyboard that the number pad will not work. I cannot find the location of the configuration file to get it to work. I have to say, I have not tried another keyboard as my location is remote. Any suggestions?

Anyway at all?To pad a number with zeros, you can use a simple formula based on the TEXT function. To pad with a variable number of zeros, you can add the REPT function. The TEXT function can apply number formats of any kind to numbers. It is most often used when you want to maintain number formatting for a number when concatenating that number with other text.

In this case, the TEXT function is used to apply a number format that consists only of zeros: "", "", "", etc. These number formats automatically format a number by adding zeros to the left as needed to reach the total number of zeros supplied.

Note: padding a number with zeros this way changes the number into text, which may or may not suit your needs. To simply display a number with padding, see below. To pad a number with zeros for display only, just select the cell s and apply a custom number format like so:.

The REPT function repeats text a given number of times. You can either hard-code the "number times" argument as above or pick it up from elsewhere on the worksheet. You can use the TEXT function to embed formatted numbers inside text. Formulas are the key to getting things done in Excel. You'll also learn how to troubleshoot, trace errors, and fix problems.

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Puppy shopPad a number with zeros. Generic formula. Related formulas. Pad week numbers with zeros. To pad week numbers or any number with zeros using a formula, you can use the TEXT function. How this formula works The Related functions.

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