If-elseif-else statements in PowerShell - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of an if statement in PowerShell?

An if statement checks a condition and runs code only if that condition is true. It helps make decisions in scripts.

beginner

How do you write an elseif statement in PowerShell?

Use the keyword 'elseif' followed by a condition in parentheses, then a script block with the code to run if that condition is true.

beginner

What does the else block do in an if-elseif-else structure?

The else block runs code when none of the previous if or elseif conditions are true. It acts as a fallback.

beginner

Show the basic syntax of an if-elseif-else statement in PowerShell.

if (<condition1>) { # code if condition1 is true } elseif (<condition2>) { # code if condition2 is true } else { # code if none are true }

intermediate

Why is it useful to use elseif instead of multiple if statements?

Using elseif checks conditions one by one and stops when one is true, making scripts faster and easier to read compared to many separate ifs.

What keyword starts an alternative condition after an if in PowerShell?

A elif

B else if

C elseif

D otherwise

PowerShell uses 'elseif' as one word to check another condition after an if.

What happens if none of the if or elseif conditions are true and there is an else block?

A Nothing happens

B The else block runs

C An error occurs

D The script stops

The else block runs as a fallback when all previous conditions are false.

Which symbol is used to start a condition in PowerShell if statements?

A () parentheses

B [] brackets

C {} braces

D <> angle brackets

Conditions in if statements are placed inside parentheses ().

Can you have multiple elseif blocks in one if statement?

A No, elseif is not valid in PowerShell

B No, only one elseif is allowed

C Yes, but only two

D Yes, you can have many elseif blocks

PowerShell allows multiple elseif blocks to check several conditions in order.

What is the correct way to write an else block?

A else { # code }

B else () { # code }

C else if { # code }

D elseif { # code }

The else block uses 'else' followed by a script block in braces {} without a condition.

Explain how if-elseif-else statements control the flow of a PowerShell script.

Think about how the script chooses which code to run based on conditions.

Write a simple PowerShell if-elseif-else script that checks a number and prints if it is positive, negative, or zero.

Use comparison operators like -gt and -lt for greater than and less than.