Put comments into example scripts.

scripts/for1.rhai

@@ -1,15 +1,17 @@
-let arr = [1,2,3,4]
-for a in arr {
-    for b in [10,20] {
-        print(a)
-        print(b)
-    }
-    if a == 3 {
-        break;
-    }
-}
-//print(a)
+// This script runs for-loops
 
-for i in range(0,5) {
-    print(i)
-}
+let arr = [1,2,3,4];
+
+for a in arr {
+    for b in [10, 20] {
+        print(a + "," + b);
+    }
+
+    if a == 3 { break; }
+}
+//print(a);                 // <- if you uncomment this line, the script will fail to run
+                            //    because 'a' is not defined here
+
+for i in range(0, 5) {      // runs through a range from 1 to 5 exclusive
+    print(i);
+}