Multiple Choice Questions on 'For' Loops for Elementary Students

📚 Quick Study Guide

• 🔄 A 'for' loop is a way to repeat a set of instructions multiple times.
• 🔢 It consists of three parts: initialization, condition, and increment/decrement.
• 🚀 Initialization: Sets up the starting value of a counter variable (e.g., $i = 0$).
• 💡 Condition: Checks if the loop should continue (e.g., $i < 10$). The loop runs as long as the condition is true.
• ➕ Increment/Decrement: Changes the counter variable after each loop (e.g., $i++$ which adds 1 to $i$).
• 🎯 The code inside the loop (between the curly braces `{}`) is executed repeatedly.
• 📝 Example: `for (int i = 0; i < 5; i++) { System.out.println(i); }` This prints numbers 0 to 4.

💻 Practice Quiz

1. What is the main purpose of a 'for' loop?
   1. To define a variable.
   2. To repeat a block of code.
   3. To print text on the screen.
   4. To create a new program.
2. Which part of the 'for' loop sets up the starting value?
   1. Condition
   2. Increment
   3. Initialization
   4. Loop Body
3. What happens if the condition in a 'for' loop is always true?
   1. The loop runs once.
   2. The loop doesn't run.
   3. The loop runs forever.
   4. The program crashes.
4. What does 'i++' do in a 'for' loop?
   1. Subtracts 1 from i.
   2. Adds 1 to i.
   3. Multiplies i by 2.
   4. Divides i by 2.
5. How many times will the following loop run?

   for (int j = 0; j < 3; j++) { System.out.println(j); }

   1. 0
   2. 1
   3. 2
   4. 3
6. Which of the following is the correct syntax for a 'for' loop?
   1. for i = 0; i < 10; i++ { }
   2. for (i = 0; i < 10; i++) { }
   3. for (int i = 0, i < 10, i++) { }
   4. for {int i = 0; i < 10; i++}
7. What is the output of the following code?

   for (int k = 2; k <= 4; k++) { System.out.print(k + " "); }

   1. 2 3
   2. 2 3 4
   3. 3 4
   4. 2 4