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3. Absolute Value

The concept of abosolute value has many uses, but you probably won't see anything interesting for a few more classes yet. There is a technical term definition for absolute value, but you could easily never need it. For now, you should biew the absolute value of a number as its distance from zero.

The absolute value of x, denoted "lx'" (and which is read as "the abosulte value of x") is the distance of x from zero. This is why absolute value is ever negative; absolute value ony asks "how far?", not "in which direction?" This means not only that l3l = 3, because 3 is three units to the right of zero, but also that l-3l = 3 , because -3, because -3 is three units to the left of zero.

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