Question

Consider the following methods’ headers:

public static int one(int a, char b, double c, String d)

public static double two(double x, double y)

public static char three(int r, int s, char t, double u)

Answer the following questions:

Q1) What is the signature of method one? Answer:

Q2) What is the return type of method two? Answer:

Q3) What the formal parameters of method three? Answer:

Q4) How many actual parameters are needed to call the method three? Answer:

Q5) Write a statement that prints the value returned by method two with the actual parameters 17.5 and 18.5, respectively. Answer:

Q6) Write a return statement in method three that returns the value of variable t. Answer:

Answer 1

1.

The method signature is part of the method declaration. It's the combination of the method name and the parameter list.

ANS: The signature for method 1: one(int, char, double, String )

2.

You declare a method's return type in its method declaration. Within the body of the method, you use the return statement to return the value. Any method declared void doesn't return a value.

ANS: double

3.

Formal Parameter: A variable and its type as they appear in the prototype of the function or method.

ANS: int r, int s, char t, double u

4.

Actual Parameter: The variable or expression corresponding to a formal parameter that appears in the function or method call in the calling environment.

ANS: 4 actual parameters are needed to call the method three

5.

for printing the returned value of method two following syntax can be used:

ANS: System.out.printf("%f \n", two(17.5,18.5));

6.

for returning t in method 3, following syntax can be used:

ANS:

public static char three(int r, int s, char t, double u)

{

return t;   

}