For Loops Lecture Questions

for(int i = 3; i > 0; i--) {

System.out.print(i + " ");

}

What is the output of the code above?

• 3 2 1 0

• 1 2 3
• 3 2 1
• 3 2

for (int i = 0; i < 4; i++); {

System.out.println(i);

}

What is the error in the code above?

• There is no semicolon ( ; ) after the for loop

• The code is correct

• The print statement should be outside of the curly braces {}

• The curly braces {} should be square brackets[]

for (int i = 0; i < 11; i++) {

System.out.println(i);

}

I want to change the above code so that it counts from 5 to 10 instead of 0 to 10. What code should I change?

• for (int i = 1; i <= 5; i++)

  { System.out.println(i); }

• for (int i = 5; i < 11; i++)

  { System.out.println(i); }

• for (int i = 5; i < 11; i++)

  { System.out.println(i); }

• for (int i = 0; i < 11; i+=2)
  { System.out.println(i); }

int count = 0;

for (int i = 10; i > 0; i--)

System.out.println(i);

count++;

What is the problem with the code above?

• There is a missing semicolon ( ; )

• There are no curly braces {}

• There are no square brackets []

• The code is correct

for (int i = 10; i < 20; i += 3) {

System.out.println(i);

}

What is the output of the code above?

• 13

  16

  19

  22

• 10

  13

  16

  19

  22

• 13

  16

  19

• 10 13 16 19

int[] nums = {1, 2, 3, 4};

int index = 0;

while (index < nums.length) {

  nums[index] *= 2;

  index += 2;

}

Rewrite the above code so that it uses a for loop instead of a while loop.