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I have come across variables (or parameters) being declared like this:
${var_name} = "Hello world!"
As far as I can tell, this is no different to the following:
$var_name = "Hello world!"
I am wondering if the {} braces in the first example do or mean anything. Do they change the behaviour of the variable?
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Curly braces in PowerShell variable names allow for arbitrary characters in the name of the variable. If there are no "pathological" characters in the variable name, then the braces are not needed and have no effect.
The end of the variable name is usually signified by a space or newline. But what if we don't want a space or newline after printing the variable value? The curly braces tell the shell interpreter where the end of the variable name is.
Different programming languages have various ways to delineate the start and end points of a programming structure, such as a loop, method or conditional statement. For example, Java and C++ are often referred to as curly brace languages because curly braces are used to define the start and end of a code block.
Curly braces in PowerShell variable names allow for arbitrary characters in the name of the variable. If there are no "pathological" characters in the variable name, then the braces are not needed and have no effect.
You'll find that "generated" code will sometimes use curly braces because they guarantee that the variable name is valid.
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