Write Expressions that Require Nested Loops

Your Turn

• Write program code to complete the provided tasks.
• Use nested loops to solve these problems.
• Run the code in the Java Playground to see if your code generates the desired result.
• Make necessary changes until you have satisfied the tasks.

Nested Loops Tutorial

Practice 1: Multiplication Table

• Write nested loops to print the multiplication table from 1 to 10.
• Sample Output:

  1 2 3 4 5 6 7 8 9 10
  2 4 6 8 10 12 14 16 18 20
  ...
  10 20 30 40 50 60 70 80 90 100
  

• Try the code in the Java Playground.

Practice 2: Analog Clock Simulation

• Write nested loops to display every possible combination of hours (1 - 12) and minutes (0 - 59) on an analog clock, each on a separate line. Be sure to include a lead 0 for hours and minutes less than 10.
• Sample output:

  01:00
  01:01
  ...
  12:59
  

• Try the code in the Java Playground.

Practice 3: Exam Seating Arrangement

• A hall contains 20 rows and each row has 10 seats.
• Write nested loops to print the string "Row X, Seat Y" for each seat.
• Try the code in the Java Playground.

Practice 4: Coin Toss Simulation

• Use nested loops to generate coin tosses for 3 players. Simulate the tossing a coin for each player. Print as a string "Player X, HEADS" or "Player X, TAILS".
• Continue to simulate the tossing of a coin until one of the players has had "HEADS" more than 5 times.
• Try the code in the Java Playground.

Practice 5: Typing Practice Until Error-Free

• A student types lines for practice. On each line attempt, there’s a 10% chance he types with no errors (Math.random() < 0.1). He continues practicing a line until he gets it error-free, then moves to the next line.
• Simulate this for 5 lines and print how many attempts it took for each.
• Try the code in the Java Playground.

Resources

Practice: Evaluate Expressions that Contain Nested Loops