Do–while loop in Java - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to start a do-while loop that prints "Hello" once.

Java

do {
    System.out.println("Hello");
} [1] (false);

Drag options to blanks, or click blank then click option'

Awhile

Bfor

Cif

Dswitch

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'if' instead of 'while' after the do block.

Forgetting the parentheses around the condition.

The do-while loop in Java uses the keyword while after the do block to specify the loop condition.

2fill in blank

medium

Complete the code to declare an integer variable i initialized to 0 before the do-while loop.

Java

[1] i = 0;
do {
    System.out.println(i);
    i++;
} while (i < 3);

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AString

Bfloat

Cint

Dboolean

Attempts:

3 left

💡 Hint

Common Mistakes

Using float or boolean instead of int.

Using String for a number variable.

In Java, int is used to declare integer variables like i.

3fill in blank

hard

Fix the error in the do-while loop condition to correctly check if i is less than 5.

Java

int i = 0;
do {
    System.out.println(i);
    i++;
} while (i [1] 5);

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A>=

B>

C==

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using > or >= which would cause the loop to never run or run incorrectly.

Using == which only runs when i equals 5.

The loop should continue while i is less than 5, so the condition uses the < operator.

4fill in blank

hard

Fill both blanks to create a do-while loop that prints numbers from 1 to 3.

Java

int num = 1;
do {
    System.out.println(num);
    num[1];
} [2] (num <= 3);

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A++

B--

Cwhile

Dif

Attempts:

3 left

💡 Hint

Common Mistakes

Using decrement operator -- which would count down instead of up.

Using if instead of while after the do block.

The variable num is increased by 1 each loop using ++. The loop continues while num is less than or equal to 3 using while.

5fill in blank

hard

Fill all three blanks to create a do-while loop that prints "Count: x" for x from 1 to 4.

Java

int count = [1];
do {
    System.out.println("Count: " + [2]);
    [3];
} while (count <= 4);

Drag options to blanks, or click blank then click option'

A1

Bcount

Ccount++

D0

Attempts:

3 left

💡 Hint

Common Mistakes

Starting count at 0 which would print from 0 instead of 1.

Forgetting to increment count inside the loop.

The variable count starts at 1. Inside the loop, it prints the current count and then increases it by 1 using count++.