numeric variable can hold only numbers
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Although you might not have known it, this data type cannot store just any number. Rather, it can store any signed whole number that can be represented in 4 bytes or 32 bits—any number between –2,147,483,648 and 2,147,483,647.
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Integer variables hold values that have no fractional part (that is, whole numbers only). ... Integer variables come in two flavors: signed integer variables can hold positive or negative values, whereas unsigned integer variables can hold only positive values (and 0).
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