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Know when the double, int, String, and char data types are best used. Example: I would store a social security number in a string because the social can contain dashes and it is only used for displaying
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Know when the double, int, String, and char data types are best used. Example: I would store a social security number in a string because the social can contain dashes and it is only used for displaying not for a mathematical equation.

User Dana Shalev
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A double is best used for numbers that are real, as in they have a decimal. Int is best used for numbers that are whole, as in no decimal. Strings are best used, as in the example you gave, when you have to represent a piece of information that isn’t strictly numbers
User Greay
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