Methods

What do I put as the return type if I don't want to return anything from a method?

• int

• none

• void

• leave it empty!

True or False:

A method does not need to have any parameters.

• True

• False

What is the correct way to define a method that subtracts two numbers, returning the difference?

• public static void subtract(int num1, int num2)

• public static int subtract (int num1, int num2)

• public static int subtract(String num1, String num2)

• public static void subtract(int num1, num2)

Fill in the blank for defining a method that returns the square root of a number:

public static (a)   squareRoot(double number);

Which of the following statements is false?

• A method is good for reusing code.

• A method with a return type must return a variable of that return type.

• A method must always have at least 1 parameter.

• A method with a void return type must not return anything.

Select all of the following code snippets that are correct for calling a method sum, which returns the sum of two numbers:

• int sum = add(5, 7);

• System.out.println(add(5,7));

• add(5);

• add(5,7);

Why is the following call to method minOfTwo, which returns the minimum number of 2 given numbers, incorrect?

int min = minOfTwo(8,"9");

• The method minOfTwo only takes in one parameter.

• The method minOfTwo does not return anything.

• The method minOfTwo takes in two integers, but a String is being passed in.

• There is nothing incorrect with this method call.

True or False:

There is something incorrect about the following call to the method minOfTwo:

int min = minOfTwo(int 8, int 9);

• True

• False

What is wrong with the following code snippet?

public static multiply(int a, int b) {

return a * b;

}

• Nothing, it is correct.

• It should return a String, not an integer.

• It should not return anything.

• It is missing the int return type in the method definition.

What will be printed from the following code snippet, where minOfTwo is a method that returns the minimum number?

System.out.println(minOfTwo(10,-1));

• 10

• -1

• Nothing, there is an error

• minOfTwo(10,-1)