September 2017 Update

Task/Gamma-function/Sidef/gamma-function-2.sidef

@@ -3,36 +3,35 @@ func gamma(z) {
     func withinepsilon(x) {
         abs(x - abs(x)) <= epsilon
     }
-
+ 
     var p = [
         676.5203681218851,     -1259.1392167224028,
         771.32342877765313,    -176.61502916214059,
         12.507343278686905,    -0.13857109526572012,
         9.9843695780195716e-6,  1.5056327351493116e-7,
     ]
-
-    var result;
-    z = Complex(z)
-    const pi = Complex.pi
-
-    if (z.real < 0.5) {
-        result = (pi / (sin(pi * z) * gamma(Complex(1) - z)))
+ 
+    var result = 0
+    const pi = Num.pi
+ 
+    if (z.re < 0.5) {
+        result = (pi / (sin(pi * z) * gamma(1 - z)))
     }
     else {
         z -= 1
         var x = 0.99999999999980993
-
+ 
         p.each_kv { |i, v|
             x += v/(z + i + 1)
         }
-
+ 
         var t = (z + p.len - 0.5)
         result = (sqrt(pi*2) * t**(z+0.5) * exp(-t) * x)
     }
-
-    withinepsilon(result.im) ? result.real : result
+ 
+    withinepsilon(result.im) ? result.re : result
 }
-
+ 
 for i in 1..10 {
-    say ("%.14e" % gamma(i/3));
+    say ("%.14e" % gamma(i/3))
 }