support up to 6 args, euler

examples/euler5.zr

@@ -0,0 +1,21 @@
+func print_i64[x : I64] : I64
+    printf("%ld\n", x)
+
+func gcd[a: I64, b: I64] : I64
+    while b != 0
+        let tmp: I64 = b
+        b = a % b
+        a = tmp
+    return a
+
+func lcm[a: I64, b: I64] : I64
+    return (a * b) / gcd(a, b)
+
+func main[] : I64
+    let out: I64 = 1
+
+    let i: I64 = 1
+    while i < 21
+        out = lcm(out, i)
+        i = i + 1
+    print_i64(out)