awk - concatenate two string variable and assign to a third

awk concatenate string and variable
awk concatenate lines
awk join strings with separator
awk concatenate columns
awk '(gsub)
awk sprintf
awk substring
awk assign variable

In awk, I have 2 fields: $1 and $2.

They are both strings that I want to concatenate and assign to a variable.

You can say:

awk '{b=$1$2; print b}' file

If you want to have an space in between, do:

awk '{b=$1" "$2; print b}' file

Which in fact is the same to use FS, because it defaults to the space:

awk '{b=$1 FS $2; print b}' file
$ cat a
hello how are you
i am fine
$ awk '{b=$1$2; print b}' a
$ awk '{b=$1 FS $2; print b}' a
hello how
i am

You can play around with it in ideone:

awk - awk concatenate string variable, No operator is needed (or used). Your example would be something like. BEGIN{ t="." r=";" w=t r print w}. For related discussion. 6.2.2 String Concatenation in  I'm trying to pull two numerical values out of a string and assign them to variables using awk (gawk is what I'm using specifically). I want to pull the major and minor version numbers out of a tmux version string into awk variables, e.g.:

Could use sprintf to accomplish this:

awk '{str = sprintf("%s %s", $1, $2)} END {print str}' file

Concatenation (The GNU Awk User's Guide), awk '{ print "Field number one: " $1 }' mail-list -| Field number one: Amelia -| Field Because string concatenation does not have an explicit operator, it is often It is not defined whether the second assignment to a happens before or after the  defining a string in awk. i have problem with awk,i want to define a string variable (str) depending on integer value NF to use it in another function: if NF=3 str="$1 $2 $3 ".

Concatenating strings in awk can be accomplished by the print command AWK manual page, and you can do complicated combination. Here I was trying to change the 16 char to A and used string concatenation:

echo CTCTCTGAAATCACTGAGCAGGAGAAAGATT | awk -v w=15 -v BA=A '{OFS=""; print substr($0, 1, w), BA, substr($0,w+2)}'

I used the substr function to extract a portion of the input (STDIN). I passed some external parameters (here I am using hard-coded values) that are usually shell variable. In the context of shell programming, you can write -v w=$width -v BA=$my_charval. The key is the OFS which stands for Output Field Separate in awk. Print function take a list of values and write them to the STDOUT and glue them with the OFS. This is analogous to the perl join function.

It looks that in awk, string can be concatenated by printing variable next to each other:

echo xxx | awk -v a="aaa" -v b="bbb" '{ print a b $1 "string literal"}'
# will produce: aaabbbxxxstring literal

AWK Language Programming, Modern implementations of awk , including gawk , allow the third argument of split to be a Variables in awk can be assigned either numeric or string values. If numeric values appear in string concatenation, they are converted to strings. The numeric values of the variables two and three are converted to strings and​  The idea is to include any shell command between backticks to get the result into a variable – Mayank May 17 '11 at 15:50 1 $() is preferred over backticks as it makes nesting commands easier – Silviu Aug 16 '12 at 9:22

You can also concatenate strings from across multiple lines with whitespaces.

cat file.txt apple 10 oranges 22 grapes 7

Example 1:

awk '{aggr=aggr " " $2} END {print aggr}' file.txt

10 22 7

Example 2:

awk '{aggr=aggr ", " $1 ":" $2} END {print aggr}' file.txt

, apple:10, oranges:22, grapes:7

String concatenation in bash – Linux Hint, '{ print "Field number one: " $1 }' BBS-list -| Field number one: aardvark -| Field number one: alpo-net awk - concatenate two string variable and assign to a third. In awk, I have 2 fields: $1 and $2. They are both strings that I want to concatenate and assign to a variable. awk if my input is: Marty Pants, output should be same.

Awk Tutorial: Understand Awk Variables with 3 Practical Examples, How do I concatenate two strings in a bash script? # export a variable from a script (such as in a .dotfile) declare $( awk 'NR==1 {tmp=$1} END {print "SHELL_VAR=" tmp}' /path/to/file ) export SHELL_VAR This will avoid a massive output of variables if a declare command is issued with no argument, as well as the security risks of a blind eval.

AWK - String Concatenation Operator, AWK - String Concatenation Operator - Space is a string concatenation operator that merges two strings. The following example demonstrates this − Do you want to assign the result of the awk command (i.e. numeric success or fail value) or it's output (i.e. whatever string it prints, if any)? How would you do it for any other command? (hint - it makes no difference that the command in question here is awk) – Ed Morton Feb 10 '15 at 16:39

how to concatenate string variables into a third?, now i want to concatenate the contents the contents of above mentioned three variables and put it into another variable called var4 so in the end the value of  How to Concatenate two string variables in Bash Script. Concatenating two string in bash script. Concatenating two string variables in a bash shell script

  • awk if my input is: Marty Pants, output should be same. cannot change FS
  • Or just awk '{print $1$2}' file
  • how do you concatenate named variable say a='aaa'; b='bbb' you, can manipulate the OFS variable. but how about if you want to print out other fields with the regular OSF="\t"; Is the printf the best choice?
  • @KeminZhou not very sure about what you mean, but it looks like sprintf() may help you.
  • That was the perfect solution for concatenating my string in a for loop as pwd | awk -F/ '{for (i=1; i<NF; ++i) str=sprintf("%s/%s",str,$i)}END{print str}'
  • Interestingly, this is the only way I could get to work on mawk (default awk implementation on Ubuntu).