basic for loop + examples -> era3

examples/fib.ang

@@ -1,17 +1,8 @@
 
 # calculate fibonacci numbers with a loop
 
-x := 0
-
-n := 1
-p := 1
-
-while x < 100 {
-    f := n + p
-
-    p = n
-    n = f
-
-    write(f)
-    x = x + 1
+(a, b) := (1, 0)
+for _ in 0..100 {
+    (a, b) = (a + b, b)
+    println(a)
 }