tirana
How to convert a number in the E-notation -- "5e+24" -- into a decimal Integer?
I have an number returned from an external source in the format
5e+24
which is called scientific notation, as I’ve been told.
I want to convert it into an decimal Integer. Not into a float, but an integer.
In this case, it’d be 5000000000000000000000000
How to do this?
Marked As Solved
jerdew
> Decimal.new("10.3e44") |> Decimal.to_integer
1030000000000000000000000000000000000000000000
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adamu
You could split the string and multiply it yourself:
[a, b] = String.split("5e+24", "e+")
String.to_integer(a) * 10 ** String.to_integer(b)
adamu
Right, but that will also produce non-integers.
kip
To account for a possible negative exponent:
[a, b] = String.split("5e+24", "e")
String.to_integer(a) * 10 ** String.to_integer(b)
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