RosettaCodeData/Task/Gamma-function/Wren/gamma-function.wren

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import "/fmt" for Fmt
import "/math" for Math
var stirling = Fn.new { |x| (2 * Num.pi / x).sqrt * (x / Math.e).pow(x) }
System.print(" x\tStirling\t\tLanczos\n")
for (i in 1..20) {
var d = i / 10
System.write("%(Fmt.f(4, d, 2))\t")
System.write("%(Fmt.f(16, stirling.call(d), 14))\t")
System.print("%(Fmt.f(16, Math.gamma(d), 14))")
}