for loops & while loops

Which is the correct?

• for (int i = 0; i < COUNT; i++)

  {

  
  

  }

• for (int i = 0; i < COUNT; i++);

  {

  
  

  }

• for (int i = 0; i < COUNT; i+)

• for (int i = 0 i < COUNT i++)

  {

  
  

  }

Which will print "Hello Karel" 1000 times?

• for (int i = 0; i < 100; i++)

  {

  System.out.println("Hello Karel");

  }

• for (int i = 0; i < 1000; i++)

  {

  System.out.println("Hello Karel");

  }

• for (int i = 0 i < 1000; i++)

  System.out.println("Hello Karel");

  }

• for (int i = 0; i < 1000; i+)

  {

  System.out.println("Hello Karel");

  }

Which of the following will count down from 1 to 10 without error?

• public class WhileLoop extends ConsoleProgram

  {

  public void run()

  {

  int i = 10;

  while(i >= 0)

  System.out.println(i);

  i--;

  }

  }

• public class WhileLoop extends ConsoleProgram

  {

  public void run()

  {

  int i = 10;

  while(i >= 0)

  {

  System.out.print(i);

  i--;

  }

  }

  }

• public class WhileLoop extends ConsoleProgram

  {

  public void run()

  {

  int i = 9;

  while(i >= 0)

  {

  System.out.println(i);

  i--;

  }

  }

  }

• public class WhileLoop extends ConsoleProgram

  {

  public void run()

  {

  int i = 10;

  while(i >= 0)

  {

  System.out.println(i);

  i--;

  }

  }

  }

Pick the for loop which duplicates this while loop:

int x = 0;

while ( x < 500 )

{

System.out.println( x );

x = x + 5;

}

• for ( int x = 5; x <= 500; x+=5 )

  System.out.println( x );

• for ( int x = 0; x < 500; x+=5 )

  System.out.println( x );

• for ( float x = 0.0; x < 500.0; x += 5.0 )

  System.out.println( x );

• for ( int x = 500; x >= 0; x-=5 )

  System.out.println( x );

What does the following print?

for ( int j = 0; j < 5; j++ )

{

for ( int k = 0; k < 10 ; k++ )

System.out.print( "*" );

System.out.println( );

}

• **********

  **********

  **********

  **********

  **********

• **********

  **********

  **********

  **********

  **********

  **********

  **********

  **********

  **********

  **********

• *****

  *****

  *****

  *****

  *****

  *****

  *****

  *****

  *****

  *****

• *

  *

  *

  *

  *

What is the output of the following code fragment?

for ( int count = 0; count <= 20; count+=2 )

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

System.out.println( );

• 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

• 0 2 4 6 8 10

• 0 2 4 6 8 10 12 14 16 18

• 0 2 4 6 8 10 12 14 16 18 20

var i = 0;

while (i < 3)

{

println("Hello There");

i++;

}

What does the code output?

• Hello There

  Hello There

  Hello There

• Hello There

  Hello There

• Hello There

• 

Which of these is an example of a loop?

• while ( x < 100.0 )

  {

  System.out.println( x );

  x += 0.1;

  }

• 
• while ( sum <= 350 )

  {

  sum += j ;

  j += 5 ;

  }

• double x = 0.0;

  while ( x < 100.0 )

  {

  System.out.println( x );

  x += 0.1;

  }

var i = 0;

while (i < 3)

{

println("hi");

i++;

}

println("bye");

What does the code output?

• hi

  bye

• hi

  bye

  hi

  bye

  hi

  bye

• hi

  hi

  hi

  bye

• hibyehibyehibye

var i = 0;

while (i < 0)

{

println("hi");

}

What does the code output?

• It will output an error!

• It won't output anything.

• hi

•