Basic type system working

examples/pi-approx.py

@@ -0,0 +1,36 @@
+terms = 100000
+
+tot = 0
+
+n = 1
+while n <= terms:
+    tot = tot + 1 / (n*n)
+    n = n + 1
+
+tot = tot * 6
+
+# get the absolute value of a number
+def abs(x):
+	if x < 0:
+		return -x
+	return x
+
+# calculate an approximation of the square root of tot using
+# newton's method.
+# see: https://en.wikipedia.org/wiki/Newton's_method
+# The required accuracy
+SQRT_ACC = 0.00000001
+def sqrt(x):
+    pg = 0 # previous guess
+    g = 1 # current guess
+
+    while abs(pg - g) >= SQRT_ACC:
+        pg = g
+        g = (pg + tot/pg)/2
+
+    return g
+
+tot = sqrt(tot)
+
+# output the result
+print(tot)