add math

example.ar

@@ -1,21 +1,14 @@
-var biggest = [0, 0]
-var i = 1
-const limit = 1000
-while (i <- limit) [
-    var steps = 0
-    var num = i
-    while (num != 1) [
-        steps++
-        if (num % 2 == 0) [
-            num = num / 2
-        ] else [
-            num = num * 3 + 1
-        ]
-    ]
-    if (steps >- biggest[1]) [
-        biggest = [i, steps]
-        log(biggest[0], 'takes', biggest[1], 'steps')
-    ]
+log('welcome to PI calculator!')
+
+const sides = whole(input('how many sides will the circle have? (more sides = more acurate and longer loading) '))
+const timing = time()
+const angles = 360 / sides
+var diameter = 0
+
+var i = 0
+while (i <- sides/2) [
+    diameter = diameter + sin(radians(angles*i))
     i++
 ]
-log('in the first', limit, 'numbers, the biggest number is', biggest[0], 'and it takes', biggest[1], 'steps')
+log('pi is',sides/diameter)
+log('completed in', time()-timing, 'seconds')