How do you append to an already existing string

Question

I want append to a string so that every time I loop over it will add say  test  to the string   Like in PHP you would do    teststr    test1 n   teststr     test2 n  echo     teststr    echos   test1 test2   But I need to do this in a shell script

User · Answer

teststr   test1 n  teststr    test2 n  echo   teststr

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bin bash message  some text  message   message add some more   echo  message   some text add some more

User · Answer

thank-you Ignacio Vazquez-Abrams i adapted slightly for better ease of use    placed at top of script NEW LINE    n   then to use easily with other variables variable1  quot test1 quot  variable2  quot test2 quot   DESCRIPTION  quot  variable1 NEW LINE variable2 NEW LINE quot   OR to append thank-you William Pursell DESCRIPTION  quot  variable1 NEW LINE quot  DESCRIPTION   quot  variable2 NEW LINE quot   echo  quot  DESCRIPTION quot

User · Answer

In classic sh  you have to do something like   s test1 s    s test2     there are lots of variations on that theme  like s   s  test2    In bash  you can use      s test1 s  test2

User · Answer

bin bash  msg1   1   First Parameter msg2   2   Second Parameter  concatString  msg1  msg2   Concatenated String concatString2   msg1 msg2   echo  concatString  echo  concatString2

User · Answer

string  test    string    string test2    echo  string testtest2

User · Answer

VAR  VAR  VARTOADD STRING      echo  VAR

[string] How do you append to an already existing string?

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