Which keywords are valid in conditional statements in Kotlin?

In Kotlin, the keywords that are valid in conditional statements are "if" and "else." The "if" keyword is used to evaluate a condition, and if that condition is true, the block of code following it will execute. If it is false, the "else" block (if provided) executes instead. This structure allows for straightforward decision-making within code.

The other choices consist of keywords that either serve different purposes or belong to other programming constructs. For instance, "case" and "switch" are used for handling multiple possible values in other programming languages like Java or JavaScript, but Kotlin uses "when" for that purpose instead. The terms "false" and "true" are Boolean literals representing logical values but are not keywords that control flow. Lastly, "for" and "while" are used for iteration rather than conditional expressions. Thus, "if" and "else" are the correct keywords for conditional statements in Kotlin.