Range operator (..) in PowerShell - Practice Problems & Coding Challenges

Challenge - 5 Problems

💻 Command Output

intermediate

What is the output of this PowerShell range operator?

Consider the following PowerShell command:

$result = 5..8
$result

What will be the output?

PowerShell

$result = 5..8
$result

A 5 6 7 8

B 5..8

C 8 7 6 5

D Error: Invalid range operator usage

💡 Hint

The range operator creates a sequence of numbers from the first to the second number.

The range operator (..) in PowerShell generates an array of integers starting from the left number up to the right number inclusive. So 5..8 produces 5, 6, 7, 8.

💻 Command Output

intermediate

What does this PowerShell code output?

Look at this code snippet:

$numbers = 10..7
$numbers

What will be the output?

PowerShell

$numbers = 10..7
$numbers

A 10 9 8 7

B 7 8 9 10

C 10 7

D Empty array

💡 Hint

The range operator counts down if the first number is greater than the second.

PowerShell's range operator creates an ascending sequence only if the first number is less than or equal to the second. If the first number is greater, it produces an empty array. So 10..7 produces an empty array.

📝 Syntax

advanced

Which option correctly uses the range operator to create an array from 3 to 6?

Select the PowerShell code that correctly creates an array containing numbers 3, 4, 5, and 6.

A $arr = 3..6..1

B $arr = 3..6

C $arr = 3-6

D $arr = 3...6

💡 Hint

The range operator uses two dots between numbers.

The correct syntax for the range operator is two dots (..). Option B uses this correctly. Option B has three dots which is invalid syntax. Option B uses a dash which is subtraction, not range. Option B uses extra dots which is invalid.

🚀 Application

advanced

How many elements are in the array created by this range?

Given this PowerShell code:

$array = 15..10

How many elements does $array contain?

A 4

B 5

C 0

D 6

💡 Hint

Count all numbers from 15 down to 10 inclusive.

PowerShell's range operator only creates ascending sequences. Since 15 is greater than 10, the range 15..10 produces an empty array with 0 elements.

🧠 Conceptual

expert

What error does this PowerShell code produce?

Analyze this code:

$result = 5..'8'

What happens when you run it?

A Error: Cannot convert value '8' to type 'System.Int32'

B Outputs: 5 '8'

C Outputs: 5 6 7 8

D Empty array

💡 Hint

The range operator requires both ends to be integers.

PowerShell cannot create a range when one end is a string that cannot be converted to an integer automatically. This causes a conversion error.