String type and interpolation in PowerShell - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a string in PowerShell?

A string is a sequence of characters used to represent text. In PowerShell, strings are enclosed in single ('') or double ("") quotes.

beginner

How do single quotes and double quotes differ in PowerShell strings?

Single quotes ('') create literal strings where variables are not expanded. Double quotes ("") allow variable interpolation, meaning variables inside the string are replaced with their values.

beginner

Example: What will this output? <br>

$name = 'Sam'
Write-Output 'Hello, $name'

It will output: Hello, $name <br>Because single quotes do not expand variables, the output shows the variable name literally.

beginner

Example: What will this output? <br>

$name = 'Sam'
Write-Output "Hello, $name"

It will output: Hello, Sam <br>Because double quotes allow variable interpolation, the variable $name is replaced with its value.

intermediate

How can you include a literal dollar sign ($) in a double-quoted string without triggering variable interpolation?

Use the backtick (`) escape character before the dollar sign, like this: "Price is `$5". This prints: Price is $5.

Which quotes allow variable interpolation in PowerShell?

A Double quotes ("")

B Single quotes ('')

C Backticks (`)

D No quotes allow interpolation

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

What will this output? <br>

$var = 10
Write-Output 'Value is $var'

A Value is $var

B Value is 10

C Error

D Value is

Single quotes do not expand variables, so $var is printed literally.

How do you escape a dollar sign in a double-quoted string?

A Use single quotes instead

B Use a backtick before $

C Use a backslash before $

D No need to escape

In PowerShell, the backtick (`) escapes special characters like $.

What type of string is this? <br>

'Hello, World!'

A Interpolated string

B Here-string

C Literal string

D Command string

Single quotes create literal strings where variables are not expanded.

Which is true about double-quoted strings in PowerShell?

A They do not allow variable expansion

B They are deprecated

C They are used only for commands

D They allow variable expansion

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

Explain the difference between single-quoted and double-quoted strings in PowerShell.

Think about how variables behave inside each type of quotes.

How do you include a literal dollar sign ($) in a double-quoted string without triggering variable interpolation?

Remember the escape character in PowerShell.