1

I try to use string interpolation in PowerShell:

$myvariable = "World"
Write-Host "Hello $myvariable"

The code above works fine, writes "Hello World"

However in case if in the string the character follows the variable part forms a legal variable name, it cannot be parsed because of the ambiguity

$myvariable = "World"
Write-Host "Hello $myvariableimmediately continuing"

Question

I understand this should not work, but despite of googling I can not find such an example. What is the syntax I miss?

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2 Answers 2

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7

If you want run-on text to your variable, you can do it like this:

Write-Host "Hello $($myvariable)immediately continuing"

Hello Worldimmediately continuing

The $($variable) construction is also useful if your object is multivalued and you just want to write out one value.

Write-host "My cat's name is $($cat.name) and he is $($cat.age) years old"

The parentheses are operating in basically the same way they do in mathematics - the expression inside is evaluated first, and then the result is parsed with rest of the statement.

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1 Comment

Thanks, I accepted the answer with {} syntax as it seems to shorter, but upvoted your too.
5

The space is only one way to end a variable name.You can use brackets to exactly define the length of a variable in a string. 

$myvariable = "World"
Write-Host "Hello ${myvariable}immediately continuing"
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1 Comment

Thanks, minor correction: as I tried to find out, I experienced that not only space, but anything what does not qualify as legal character in variable name, like .,/( etc

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