atan() function in Lua’s math library evaluates the arctangent (inverse tangent) of a given number. The arctangent is the angle in radians (the answer returned) whose tangent is equal to the given value.
x: The number representing the tangent.
In this example,
math.atan() calculates the arctangent of 1.
local x = 1local answer = math.atan(x)local output = string.format("The arctangent of %.2f is approximately %.4f", x, answer)print(output)
This will result in the following output below.
The arctangent of 1.00 is approximately 0.7854