Loops Toggle Code Practice (2.7-2.12)

Loops Toggle Code Practice (2.7-2.12)

Each coding exercise has its own folder. Open its .java file and press Run to try it. Run Tests checks every graded exercise in this lesson at once.

For each of the coding problems below, write your own solution.

Exercise 1

Finish the code to print out all the values from 20 to 30 (20, 21, 22, … 30).

Open the 01-u2b-toggle1 folder and edit Test1.java. Press Run to try it; Run Tests checks it (2 tests). The tests expect each value on its own line.

Exercise 2

Finish the code to print a countdown from 15 to 0 (15, 14, 13, … 0).

Open the 02-u2b-toggle2 folder and edit Test1.java. Press Run to try it; Run Tests checks it (2 tests). The tests expect each value on its own line.

Exercise 3

Finish the code to print up from 0 to 50 by 5 (0, 5, 10, 15 … 50).

Open the 03-u2b-toggle3 folder and edit Test1.java. Press Run to try it; Run Tests checks it (2 tests). The tests expect each value on its own line.

Exercise 4

Finish the code to print out the values from 0 to 100 by 20’s (0, 20, 40, … 100).

Open the 04-u2b-toggle4 folder and edit Test1.java. Press Run to try it; Run Tests checks it (2 tests). The tests expect each value on its own line.

Exercise 5

Finish the code to print out the values from 100 to 0 by 10’s (100, 90, 80, … 0).

Open the 05-u2b-toggle5 folder and edit Test1.java. Press Run to try it; Run Tests checks it (2 tests). The tests expect each value on its own line.

Exercise 6

Finish the code to print 3 rows with 6 * in each row. Be sure to use two loops.

Open the 06-u2b-toggle6 folder and edit Test1.java. Press Run to try it; Run Tests checks it (2 tests).

Exercise 7

Finish the code to print 1 (followed by a newline), then 22 (followed by a newline), and then 333 (followed by a newline). Be sure to use two loops.

Open the 07-u2b-toggle7 folder and edit Test1.java. Press Run to try it; Run Tests checks it (2 tests).

Exercise 8

Finish the code to print 11111, 22222, 33333, 44444, and 55555. Be sure to use two loops.

Open the 08-u2b-toggle8 folder and edit Test1.java. Press Run to try it; Run Tests checks it (2 tests). The tests expect each value on its own line.

Exercise 9

Finish the code to print 11111, 2222, 333, 44, 5. Be sure to use two loops.

Open the 09-u2b-toggle9 folder and edit Test1.java. Press Run to try it; Run Tests checks it (2 tests). The tests expect each value on its own line.

Exercise 10

The even_div(s, n) method in the NumWorker class should return the number of digits in s (a string representation of a number) that are evenly divisible by n. For example, even_div("6892",3) should return 2 since both 6 and 9 are evenly divisible by 3.

Open the 10-u2b-toggle10 folder and edit NumWorker.java. Press Run to try it; Run Tests checks it (2 tests).