1. Assume that all variables in the following code are properly declared and tha

Question

1.

Assume that all variables in the following code are properly declared and that the input is 3 7 4 –1. The output is 13.

num = console.nextInt();
sum = num;
while (num != -1)
{
     num = console.nextInt();
     sum = sum + num;
}
System.out.println(sum);

False

2.

int i;
for (i = 0; i <= 10; i++)
    System.out.println("*");
System.out.println("!");

Which of the following is the initial expression in the for loop above?

i = 0;

i <= 10;

i++

d. System.out.println("*");

3.

int i;
for (i = 0; i <= 10; i++)
    System.out.println("*");
System.out.println("!");

Which of the following is the update expression in the for loop above?

i = 0;

i <= 10;

i++

d. System.out.println("*");

True

False

2.

int i;
for (i = 0; i <= 10; i++)
    System.out.println("*");
System.out.println("!");

Which of the following is the initial expression in the for loop above?

a.

i = 0;

b.

i <= 10;

c.

i++

d. System.out.println("*");

3.

int i;
for (i = 0; i <= 10; i++)
    System.out.println("*");
System.out.println("!");

Which of the following is the update expression in the for loop above?

a.

i = 0;

b.

i <= 10;

c.

i++

d. System.out.println("*");

Explanation / Answer

Question 1

Answer: True

The output of the above code is 13 because we are adding all eleenets that are read from console.

Question 2

Answer: i = 0;

The initial expression of the for loop is i = 0;

Question 3

Answer: i++

i++ is the updated expression in for loop.

for ([initial-expression]; [condition]; [increment-expression])
{
statements
}

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