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Kotlin Conditional Statements

Kotlin Conditional Statements - Important Points


16. Which of the following is true about the "if-let" statement in Kotlin?

A. It is used to check if a variable is null.

B. It can be used as a replacement for the if-else statement.

C. It can be nested within other conditional statements.

D. All of the above.

Discuss Work Space

Answer: option d

Explanation:

The "if-let" statement in Kotlin is used to check if a variable is null, can be used as a replacement for the if-else statement, and can be nested within other conditional statements.

17. What is the syntax for the if-let statement?

A. if (variable != null) { } else { }

B. if (variable) { } else { }

C. if (variable == null) { } else { }

D. if (variable?.let { } ) { } else { }

Discuss Work Space

Answer: option d

Explanation:

The syntax for the if-let statement is "if (variable?.let { } ) { } else { }".

18. Which of the following is an example of an if-let statement?

A. if (variable != null) { } else { }

B. if (variable) { } else { }

C. if (variable == null) { } else { }

D. if (variable?.let { } ) { } else { }

Discuss Work Space

Answer: option d

Explanation:

Option D is an example of an if-let statement.

19. What is the purpose of the "unless" expression in Kotlin?

A. To check multiple conditions.

B. To execute a block of code if a condition is true.

C. To execute a block of code if a condition is false.

D. None of the above.

Discuss Work Space

Answer: option c

Explanation:

The "unless" expression in Kotlin is used to execute a block of code if a condition is false.

20. What is the syntax for the unless expression?

A. unless (condition) { }

B. if (condition) { } else { }

C. unless { } else { }

D. unless (condition) { } else { }

Discuss Work Space

Answer: option a

Explanation:

The syntax for the unless expression is "unless (condition) { }".


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