15 lines
289 B
Text
15 lines
289 B
Text
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function extendedsqrt(x)
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try sqrt(x)
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catch
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if x isa Number
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sqrt(complex(x, 0))
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else
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throw(DomainError())
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end
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end
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end
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@show extendedsqrt(1) # 1
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@show extendedsqrt(-1) # 0.0 + 1.0im
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@show extendedsqrt('x') # ERROR: DomainError
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