Question

Suppose sum and num are int variables, and the input is 18 25 61 6 -1

What is the output of the following code?

Scanner cin = new Scanner(System.in);
sum = 0;
num = cin.nextInt();
while (num != -1)
{
sum = sum + num;
num = cin.nextInt();
}
System.out.println(sum);

Answer 1

Answer:

The output is 110 when the question's segment is executed and the input is given as 18,25,61,6,-1.

Explanation:

The program segment is used to add the user input value until the value is not "-1". It means that if a user gives the input "-1" then the program will get terminated and prints the addition of previously entered value by the user. The output is 110 for the input of (18,25,61,6,-1) because the addition of (18,25,61,6) is (110) and "-1" use to terminate the program. The program statement is described below--

1. The First statement initiates an object of  "Scanner" class which helps to call the input function to take the user input.
2. The Second statement initializes the 0 value to the "sum" variable which is an integer type.
3. The Third statement calls the "nextInt()" function to take the user input by the help of scanner class object and store it on a num variable which is an integer type.
4. The Fourth statement is a "while" loop which gives false when the user's input is "-1".
5. The Fifth statement adds the new value with the previously added value.
6. The Sixth statement takes the new input from the user.
7. The Seventh statement prints the previous added when the loop gets terminated.

Answer 2

Answer:

The program segment is used to add the user input value until the value is not "-1". It means that if a user gives the input "-1" then the program will get terminated and prints the addition of previously entered value by the user. The output is 110 for the input of (18,25,61,6,-1) because the addition of (18,25,61,6) is (110) and "-1" use to terminate the program. The program statement is described below--

The First statement initiates an object of  "Scanner" class which helps to call the input function to take the user input.

The Second statement initializes the 0 value to the "sum" variable which is an integer type.

The Third statement calls the "nextInt()" function to take the user input by the help of scanner class object and store it on a num variable which is an integer type.

The Fourth statement is a "while" loop which gives false when the user's input is "-1".

The Fifth statement adds the new value with the previously added value.

The Sixth statement takes the new input from the user.

The Seventh statement prints the previous added when the loop gets terminated.

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