❓ Do you allow wrong input to enter your function?

✋ Then stop, PowerShell can help you validate your parameters.

The first picture shows how to manually validate whether the number provided is between 1 and 100. It's not perfect.

The second picture does the same and more with fewer lines of code:

• 1️⃣ Makes the parameter required
• 2️⃣ Ensures the provided number is within 1 and 100
• 3️⃣ The [int] type ensures the $Number parameter is an integer

If any of the checks fails, PowerShell prompts the user for the right data, or errors out.

The wrong input never enters your function - it's like a bouncer at the party!

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