If statement in Java - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the number is positive.

Java

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 '>' to check positivity.

Using '<' which checks for negative numbers.

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

2fill in blank

medium

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

Java

if (number [1] 2 == 0) {
    System.out.println("Even number");
}

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

A/

B%

C*

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using division '/' instead of modulus '%'.

Using multiplication '*' or addition '+' which are not correct here.

The modulus operator % gives the remainder. If number % 2 == 0, 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

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 '<=' which check for younger ages.

Using '==' which only checks exactly 18.

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

4fill in blank

hard

Fill both blanks to check if a number is between 10 and 20 (inclusive).

Java

if (number [1] 10 && number [2] 20) {
    System.out.println("Number is between 10 and 20");
}

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

A>=

B<

C<=

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '<=' for the upper bound.

Using '>' instead of '>=' for the lower bound.

The condition number >= 10 && number <= 20 checks if the number is between 10 and 20 including both ends.

5fill in blank

hard

Fill all three blanks to print the grade based on score: A if score >= 90, B if score >= 80, else C.

Java

if (score [1] 90) {
    System.out.println("Grade A");
} else if (score [2] 80) {
    System.out.println("Grade B");
} else {
    System.out.println("Grade [3]");
}

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

A>=

CC

DB

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>=' in conditions.

Printing wrong grade letters in else block.

The first condition checks if score is 90 or more for grade A. The second checks if score is 80 or more for grade B. Otherwise, grade C is printed.