18 For
19 For continued

As in C or Java, you can leave the pre and post statements empty.
`for ;sum < 1000;`
We can write also, wow!
`for sum < 1000`
22 Forever
23 If
24 If with short statement

Variables declared by the statement are only in scope until the end of
the if.
(Try using v in the last return statement.)

wow!
Fix wrong section number
24 If and else
25 Exercise: Loops and Functions
Fix wrong section number