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Add 1/e constant #13

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Add 1/e constant #13

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6db5362
add exp(-1) constant
alyst Nov 19, 2021
4514543
add ASCII inve alias
alyst Dec 30, 2021
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3 changes: 2 additions & 1 deletion src/IrrationalConstants.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -26,7 +26,8 @@ export
logten, # log(10)
logπ, # log(π)
log2π, # log(2π)
log4π # log(4π)
log4π, # log(4π)
invℯ, inve # 1 / ℯ

include("stats.jl")

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3 changes: 3 additions & 0 deletions src/stats.jl
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Expand Up @@ -28,3 +28,6 @@
@irrational logπ 1.1447298858494001741 log(big(π))
@irrational log2π 1.8378770664093454836 log(2 * big(π))
@irrational log4π 2.5310242469692907930 log(4 * big(π))

@irrational invℯ 0.367879441171442321595 inv(big(ℯ))
const inve = invℯ # ASCII alias
4 changes: 4 additions & 0 deletions test/runtests.jl
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Expand Up @@ -40,3 +40,7 @@ end
@test isapprox(log(4pi), log4π)
end

@testset "1/e" begin
@test isapprox(invℯ, exp(-1))
@test isapprox(inve, exp(-1))
end