Published Nov 13, 2023
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The .log() function in Lua’s math library calculates the natural logarithmic value of a given number. The natural logarithm is to the base e, where e is Euler’s number, an irrational constant approximately equal to 2.71828.


  • number: The number for which the natural logarithm is calculated.


In this example, math.log() calculates the natural logarithmic value of 20:

local num = 20
local result = math.log(num)
local output = string.format("The natural Logarithm of %.0f: %.4f", num, result)

The above example will result in the following output:

The natural Logarithm of 20: 2.9957

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