Booleans and conditionals: Correct Solution


Part 1

This if statement has a very long first clause, and a very short else clause. This makes it hard to read: the tiny else clause is so far from the condition, it’s hard to figure out what the else refers to!

if (cungjo() != 6) {
    ...
    ...
    // Pretend there is lots of code here
    ...
    ...
} else {
    sudnup();
}

Improve readability by refactoring this conditional so that its two clauses are swapped: what is now the second clause (the else clause) comes first, and the first clause comes second.

Solution

if (cungjo() == 6) {
    sudnup();
} else {
    ...
    ...
    // Pretend there is lots of code here
    ...
    ...
}

Things to double-check in your solution:


Part 2

Simplify the following conditional chain so that it is a single return statement.

if (ma) {
    if (qu) {
        return true;
    }
}
return false;

Solution

return qu || ma;

Bonus challenge: rewrite the if/else chain above so that instead of consisting of many return true; statements with one return false; at the end, it has many return false; statements with one return true; at the end.

Solution

if (!qu) {
    return false;
}
if (!ma) {
    return false;
}
return true;

Part 3

Simplify the following messy chain of conditionals:

if ((eang != aoss) == true) {
    bouEba();
}
if (di == true && (eang != aoss) != true) {
    eddi();
}

Solution

{
    if (eang != aoss) {
        bouEba();
    }
    if (di) {
        eddi();
    }
}

Things to double-check in your solution:


Related puzzles: