When designing applications, consider carefully whether the value you are keeping really is a number that you will use in arithmetic calculations, or whether it is just a text string that contains numeric characters. You won't regret those few extra moments in your application design process when you see the extra robustness of the application and its greater resilience to change. In this helpful article, Senior Technical Editor Mick Moignard helps you understand where you could go wrong, even if you do it by the numbers.

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