This code does not print any output to the console. What is wrong? firstName?.let { println("Greeting $firstname!")}

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Question:This code does not print any output to the console. What is wrong? firstName?.let { println("Greeting $firstname!")}

1.FirstName?.let { println(

2.A null pointer exception is thrown

3.FirstName is equal to null

4.FirstName is equal to an empty string

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  1. This code does not print any output to the console. What is wrong? firstName?.let { println("Greeting $firstname!")}
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