String interpolation (double quotes) in PowerShell

Introduction

String interpolation lets you put variables inside double quotes so you can build messages easily.

When you want to show a message with a variable value inside.

When you need to create a file path that includes folder names stored in variables.

When you want to combine text and numbers in a single string for output.

When you want to make your script messages clearer and easier to read.

Syntax

PowerShell

"Hello, $name!"

Use double quotes " " to enable interpolation.

Variables inside double quotes start with $ and get replaced by their values.

Examples

Prints 'Hello, Alice!' by replacing $name with its value.

PowerShell

$name = "Alice"
"Hello, $name!"

Shows how numbers can be included inside strings.

PowerShell

$count = 5
"You have $count new messages."

Builds a file path using a variable inside the string.

PowerShell

$folder = "Documents"
"C:\Users\$folder\file.txt"

Sample Program

This script creates a message using two variables inside a double-quoted string and prints it.

PowerShell

$user = "Bob"
$age = 30
$message = "User $user is $age years old."
Write-Output $message

Important Notes

Single quotes ' ' do NOT replace variables; use double quotes " " for interpolation.

If you want to include a literal $ sign, use backtick ` like this: "Price is `$5".

Summary

Double quotes allow variables to be replaced with their values inside strings.

Use $ before variable names inside double quotes to insert their values.

This makes building messages and paths easier and clearer.