Exercise

Detecting missing numbers

You want to check if sales from your coffee shop are missing any values, like the sales quantity and amount. Validate a sample sale by checking for nulls.

The necessary packages such as Objects, and Optional have been imported for you.

Instructions

100 XP

Check if the sale quantity is null.
Check if the sale amount is null.
Set a default value of 1 for sale quantity if it is null.

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Instructions

Exercise