| Q1: | Must a control structure's test expression result in a Boolean value? |
| A1: | Ultimately, yes, but in the context of a test expression, zero, an undefined variable, or an empty string will be converted to false. All other values will evaluate to true. |
| Q2: | Must I always surround a code block in a control statement with brackets? |
| A2: | If the code you want executed as part of a control structure consists of only a single line, you can omit the brackets. However, the habit of always using opening and closing brackets, regardless of structure length, is a good one. |