If–else statement in Java - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a number is positive.

Java

int number = 10;
if (number [1] 0) {
    System.out.println("Positive number");
}

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

A>

B==

C<

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' will check for negative numbers.

Using '==' checks for equality, not positivity.

The condition number > 0 checks if the number is positive.

2fill in blank

medium

Complete the code to print "Even" if the number is even.

Java

int num = 4;
if (num % 2 [1] 0) {
    System.out.println("Even");
}

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

A==

B!=

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '!=' will check for odd numbers instead.

Using '>' or '<' does not correctly check for evenness.

The condition num % 2 == 0 checks if the number is even.

3fill in blank

hard

Fix the error in the if statement condition to check if age is at least 18.

Java

int age = 20;
if (age [1] 18) {
    System.out.println("Adult");
}

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

A<

B>=

C<=

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' or '<=' checks for younger ages.

Using '==' only checks for exactly 18.

The condition age >= 18 checks if age is 18 or older.

4fill in blank

hard

Fill both blanks to complete the if-else statement that prints if a number is positive or not.

Java

int n = -5;
if (n [1] 0) {
    System.out.println("Positive");
} else {
    System.out.println("[2]");
}

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

A>

BNegative

CZero

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' in the if condition would check for negative numbers instead.

Printing "Zero" in else is incorrect because zero is neither positive nor negative.

The condition n > 0 checks for positive numbers, else it prints "Negative".

5fill in blank

hard

Fill all three blanks to complete the if-else if-else statement that categorizes a score.

Java

int score = 75;
if (score [1] 90) {
    System.out.println("Grade A");
} else if (score [2] 75) {
    System.out.println("Grade B");
} else {
    System.out.println("[3]");
}

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

A>=

CGrade C

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>=' will reverse the logic.

Printing wrong grade labels in else block.

The first condition checks if score is 90 or above for Grade A. The second checks if score is 75 or above for Grade B. Otherwise, it prints Grade C.