Which of the following could be the last legally coded line...

Which of the following could be the last legally coded line of a method declared as public static int getVal(double sum)?
a. return;
b. return 77;
c. return 2.3;
d. Any of these could be the last coded line of the method.

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Key Concepts

Method Signatures and Return Types

In Java, a method's signature declares its return type, which specifies the type of value the method must return. For a method declared as public static int getVal(double sum), the method is required to return an integer value. This means that any return statement within the method must supply an expression of type int or an expression that can be explicitly converted to int.

Return Statements in Non-Void Methods

When a method is declared with a non-void return type, such as int, every possible execution path must end with a return statement that provides an appropriate value. A bare return statement (one without a value) is only allowed in void methods. Therefore, in a method expected to return an int, the return statement must include an integer expression.

Type Compatibility and Conversion

Type compatibility refers to ensuring that the type of the expression returned in a return statement matches the declared return type of the method. An expression returning an int literal, like 77, is compatible with an int return type, whereas a double literal, like 2.3, is not implicitly convertible to int in Java. Hence, only integer values or expressions that explicitly convert to int would be legally correct as a return statement in this context.

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