Concatenating variables in Bash

 

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  • How to concatenate string variables in Bash 27 answers

    • Try doing this, there's no special character to concatenate in bash : 

    mystring="${arg1}12${arg2}endoffile"

    explanations

    If you don't put brackets, you will ask bash to concatenate $arg112 + $argendoffile (I guess that's not what you asked) like in the following example : 

    mystring="$arg112$arg2endoffile"

    The brackets are delimiters for the variables when needed. When not needed, you can use it or not.

    another solution

    (less portable : require bash > 3.1) 

    $ arg1=foo
$ arg2=bar
$ mystring="$arg1"
$ mystring+="12"
$ mystring+="$arg2"
$ mystring+="endoffile"
$ echo "$mystring"
foo12barendoffile

    See http://mywiki.wooledge.org/BashFAQ/013

    链接地址: http://www.djcxy.com/p/29124.html

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