Concatenate string in powershell

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When outputting data from PowerShell you often need to concatenate two or more strings or variables. But there are other ways to concatenate strings as well. The problem with joining strings or variables in PowerShell is often finding the correct output method. Now if we want to output these strings together in the PowerShell console, people often tend to do the following:. The correct way to output both strings to the console is by simply placing them after each other.

Concatenate string in powershell

I do automate stuff for fun and work. I believe C is still one of the best languages out there even if it has been ages since I wrote anything in it, nowadays only use Go whenever I need something compiled or high performance. I strongly believe in clean and easy to read code leaving aliases and shortcuts for forums showoffs. Many times when writing a PowerShell script I find myself manipulating lot of strings, for example appending html code to a notification mail body, to build what the final value I want to be. The most common way of doing this is using concatenation with the most common form being something similar to this:. This is perfectly valid PowerShell code and will execute without any issue but there is a catch. Strings are immutable objects, this is the same in many languages like Python for example, and as such read only. This is taken from MSDN which makes a great job, far better than I can, to explain what is really happening behind the scenes when using the above approach:. A String object is called immutable read-only , because its value cannot be modified after it has been created. Methods that appear to modify a String object actually return a new String object that contains the modification. Because strings are immutable, string manipulation routines that perform repeated additions or deletions to what appears to be a single string can exact a significant performance penalty. Although the code appears to use string concatenation to append a new character to the existing string named str, it actually creates a new String object for each concatenation operation.

The great thing about this is it works out the backslashes correctly when it puts the values together. It considers the period as part of the string so it stops resolving the value any deeper. The PowerShell team thanks Kevin for sharing this content with us.

Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. There are many ways to use variables in strings. I'm calling this variable substitution but I'm referring to any time you want to format a string to include values from variables. This is something that I often find myself explaining to new scripters. The original version of this article appeared on the blog written by KevinMarquette. The PowerShell team thanks Kevin for sharing this content with us.

There are two common ways to concatenate strings in PowerShell:. The following examples show how to use each method in practice. For example, we can use the following syntax to concatenate two strings together using a single space as a separator:. The following screenshot shows how to use this syntax in practice:. Notice that the two strings have been concatenated together with a single space in between them. Another common way to concatenate strings together in PowerShell is to use the join operator followed by a specific separator. We can see that the two strings have been concatenated together with a single space in between them. If you would like to concatenate strings using a different separator, you can specify it after the join operator.

Concatenate string in powershell

When outputting data from PowerShell you often need to concatenate two or more strings or variables. But there are other ways to concatenate strings as well. The problem with joining strings or variables in PowerShell is often finding the correct output method. Now if we want to output these strings together in the PowerShell console, people often tend to do the following:. The correct way to output both strings to the console is by simply placing them after each other. But this is not concatenating strings. The only issue here is that you miss the space between the two strings.

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The Join-String cmdlet joins, or combines, text from pipeline objects into a single string. It considers the period as part of the string so it stops resolving the value any deeper. Please check out his blog at PowerShellExplained. The principal and results are the same as the join operator, only the writing style is a bit different:. This is taken from MSDN which makes a great job, far better than I can, to explain what is really happening behind the scenes when using the above approach:. The configuration uses the concat function to join the strings abc and def. Collaborate with us on GitHub. Enter your search term This example joins directory names, wraps the output in double-quotes, and separates the directory names with a comma and space ,. DSC Open a documentation issue Provide product feedback. You may also enjoy. A value to concatenate. If you pass a string and an array to the same function, the function raises an error.

There are different ways to concatenate strings using the -f operator, and join operator.

The output of the function is a single string with every inputValue concatenated together. Yes, ads can be annoying. Concatenating strings with variables, and especially objects or hashtables, is always a bit challenging. On anything that is very short, I may use any one of these. Between these methods, there is little difference when it comes to performance for use cases. So, about that AdBlocker To keep going on this idea; you could be importing a large email template from a text file to do this. Join-String Reference Feedback. The name of a property, or a property expression, to be converted to text. Sometimes your variable doesn't have a clean word boundary. Because strings are immutable, string manipulation routines that perform repeated additions or deletions to what appears to be a single string can exact a significant performance penalty.