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(neg, -)

A real number less than zero is called negative. A negative number is expressed by placing a negative (-) or "minus" sign before the number. This notation suggests that a positive number is being subtracted from an implicit zero: -4 = 0-4 for example. Calcute implements function neg to convert a positive number into its negative counterpart and, conversely, to convert a negative number into its positive counterpart. For a real number x, neg(x) = -x. This is equivalent to using the negative sign before the value being converted.


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Delta, British Columbia, Canada