Design Decisions Review#
These questions are designed to assess your current understanding of design decisions with conditionals!
Questions 1
Say that I wanted to write some code that, when given a day of the week as a String, it would tell me if it was a weekday or weekend.
What kind of conditional structure should I use?
ifif/elseif/else ifif/else if/else if
See Answer
Option 2 is correct!
We would want to use an if/else structure here!
Again, note that in an if/else structure, exactly one branch will be entered. We’ll be in the case where we either have a weekend or a weekday, not both!
Questions 2
Say that I wanted to write some code that, when given an int representing a place in a race (1st, 2nd, 3rd, 4th, etc.), it would a unique message (e.g. "You got first place!" or "You got second place!") only if it was 1st, 2nd, or 3rd place.
What kind of conditional structure should I use?
ifif/elseif/else ifif/else if/else if
See Answer
Option 4 is correct!
We would want to use an if/else if/else if structure here!
Note that in a general if/else if structure, either 0 or 1 branches will be entered.
We only want to produce output if the value indicates 1st, 2nd, or 3rd place. If we have a value other than those, then we don’t want to produce output.
Questions 3
Say that I wanted to write some code that, when given an int value, would only print to the console if the value was divisible by 3.
What kind of conditional structure should I use?
ifif/elseif/else ifif/else if/else if
See Answer
Option 1 is correct!
We would want to use just an if statement here!
Note that we only want to produce output if the value is divisible by 3. If we are not in that case, then we don’t want to do anything else!