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Synopsis Negate a numeric value.
Syntax - Exp
Types
Exp - Exp
int int
real real
Description Yields the negated values of Exp.
Examples 
rascal>-12
int: -12
rascal>-13.5
real: -13.5
rascal>- -12
int: 12

Questions
Question [1].
The type of --7 is

Question [2].
The type of --10.5186514496595640 is

Question [3]. 
--16.547652205870440 ==



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