Lesson 10. Converting between types

After reading lesson 10, you’ll be able to

  • Convert between numeric, string, and Boolean types

Previous lessons covered Booleans, strings, and a dozen different numeric types. If you have variables of different types, you must convert the values to the same type before they can be used together.

Consider this

Say you’re at the grocery store with a shopping list from your spouse. The first item is milk, but should you get cow’s milk, almond, or soy? Should it be organic, skim, 1%, 2%, whole, evaporated, or condensed? How many gallons? Do you call your spouse to ask or just pick something?

Your spouse may get annoyed if you keep calling to ask for each detail. Iceberg or romaine lettuce? Russet ...

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