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Which is the best way to concatenate a string in Bash?
The -n is used with echo to suppress the last line or you will have an extra new line in the end, you can also use printf to avoid all this additional argument. In this tutorial we learned about bash string concatenation using different joining character such as whitespace, newline, special characters etc.
How to add a string to a string in Bash?
The string variable can be added in any position of the string data. Create a file named ‘ concat2.sh ’ and add the following code. Here, a string variable is initialized and printed by adding the variable in the middle of the other string. Run the script by bash command. The following output will appear after executing the script.
How to join multiple lines into one in Bash?
A short Bash one-liner can join lines without a delimiter: $ ( readarray -t ARRAY < input.txt; IFS= ”; echo “$ {ARRAY [*]}” ) I cameI sawI conquered! If we use the same script but assign a single character ‘, ‘ to the IFS variable, the second problem gets solved as well:
How to concatenate strings with a new line?
Concatenate strings using new line character You can use the same operator += to append strings with new line character, although printing the output would require certain extra handling . In this example I have created an array with some values, I will iterate over these values and then join them together with a new line character at the end
Can you concatenate a string with a variable name?
You can also concatenate one or more variable with literal strings: In the example above variable VAR1 is enclosed in curly braces to protect the variable name from surrounding characters. When the variable is followed by another valid variable-name character you must enclose it in curly braces $ {VAR1}.
When to use curly braces in concatenation in Bash?
So in such case always use curly braces to denote a variable when working with concatenation. This is the one of the most important thing you should always remember when working with bash string concatenation.