Step-by-Step Explanation: Kotlin Booleans

Kotlin handles Boolean values similarly to other JVM languages but with strict type safety and built-in support for nullability.

1. The Boolean Type

The Boolean type has two possible values: true and false. Unlike some languages (like C or JavaScript), Kotlin does not treat integers (like 0 or 1) as Booleans.

2. Logical Operators

! (Negation): Inverts a boolean value.
&& (Conjunction): Returns true if both sides are true. Exhibits short-circuiting (if the left side is false, the right side is not evaluated).
|| (Disjunction): Returns true if at least one side is true. Exhibits short-circuiting (if the left side is true, the right side is not evaluated).
xor (Exclusive OR): An infix function that returns true if exactly one side is true.

3. Operator Precedence

When combining operators, they are evaluated in this order: 1. ! 2. xor 3. && 4. ||

For example, true || false && false is evaluated as true || (false && false), which is true.

4. Nullable Booleans (`Boolean?`)

A Boolean? can be true, false, or null. Because of this, it cannot be used directly in an if statement like a non-nullable Boolean.

val b: Boolean? = null
// if (b) { ... } // Error
if (b == true) { ... } // Safe

5. Verification

Verified by building the project. The implementation output confirmed that short-circuiting prevents side effects and that nullable booleans are handled safely with explicit comparisons.

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