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# func Float64Val

Defined in github.com/mailgun/godebug/Godeps/_workspace/src/golang.org/x/tools/go/exact/exact.go

## Description

Float64Val returns the nearest Go float64 value of x and whether the result is exact; x must be numeric but not Complex, or Unknown. For values too small (too close to 0) to represent as float64, Float64Val silently underflows to 0. The result sign always matches the sign of x, even for 0. If x is Unknown, the result is (0, false).