If-elseif-else statements in PowerShell - Step-by-Step Execution

Concept Flow - If-elseif-else statements

Start

↓

Evaluate if condition

Yes|No↓

Execute if block

↓

End

↓

Execute elseif block

↓

End

No↓

Execute else block

↓

End

The script checks the if condition first. If true, it runs the if block and ends. If false, it checks elseif conditions in order. If none match, it runs the else block.

Execution Sample

PowerShell

if ($x -gt 10) {
  "Greater than 10"
} elseif ($x -eq 10) {
  "Equal to 10"
} else {
  "Less than 10"
}

This script checks if $x is greater than 10, equal to 10, or less than 10, and prints a message accordingly.

Execution Table

Step	Condition Checked	Condition Result	Block Executed	Output
1	$x -gt 10	False	No
2	$x -eq 10	True	Yes	Equal to 10
3	Else	N/A	No

💡 Condition '$x -eq 10' is True, so elseif block runs and execution ends.

Variable Tracker

Variable	Start	After Step 1	After Step 2	Final
$x	10	10	10	10

Key Moments - 2 Insights

Why does the elseif block run instead of the else block?

Because the elseif condition ($x -eq 10) is True at step 2, so the script runs that block and skips the else block (see execution_table row 2 and 3).

What happens if the first if condition is True?

If the first if condition is True, the script runs the if block and skips all elseif and else blocks (not shown here but implied by the flow).

Visual Quiz - 3 Questions

Look at the execution table, what is the output at step 2?

A Greater than 10

B Less than 10

C Equal to 10

D No output

💡 Hint

Check the 'Output' column in execution_table row 2.

At which step does the script decide to run the elseif block?

A Step 2

B Step 3

C Step 1

D Never

💡 Hint

Look at the 'Block Executed' column in execution_table to see when 'Yes' appears for elseif.

If $x was 15, which block would run according to the flow?

A elseif block

B if block

C else block

D No block

💡 Hint

Refer to concept_flow and imagine $x -gt 10 would be True.

Concept Snapshot

If-elseif-else statements check conditions in order.
Syntax:
if (condition) { ... } elseif (condition) { ... } else { ... }
Only the first True condition block runs.
If none True, else block runs.
Used to choose between multiple options.

Full Transcript

This visual execution shows how PowerShell if-elseif-else statements work. The script checks the if condition first. If it is true, it runs the if block and stops. If false, it checks the elseif condition. If that is true, it runs the elseif block and stops. If none are true, it runs the else block. The example uses $x = 10. The first condition ($x -gt 10) is false, so it checks the elseif ($x -eq 10), which is true. It runs the elseif block and outputs "Equal to 10". The else block is skipped. Variables stay the same throughout. This helps decide between multiple choices in scripts.