Logical operators in C++ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if both conditions are true.

C++

bool result = (a > 5) [1] (b < 10);

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

A!

B&&

C||

D&

Attempts:

3 left

💡 Hint

Common Mistakes

Using bitwise AND (&) instead of logical AND (&&).

Using logical OR (||) when both conditions must be true.

The logical AND operator && returns true only if both conditions are true.

2fill in blank

medium

Complete the code to check if either condition is true.

C++

bool result = (x == 0) [1] (y != 0);

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

A&&

B&

C!

D||

Attempts:

3 left

💡 Hint

Common Mistakes

Using logical AND (&&) when only one condition needs to be true.

Using bitwise OR (|) instead of logical OR (||).

The logical OR operator || returns true if at least one condition is true.

3fill in blank

hard

Fix the error in the condition to correctly negate the expression.

C++

if ([1]) {
    // do something
}

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

A!flag

B~flag

C!!flag

Dflag

Attempts:

3 left

💡 Hint

Common Mistakes

Using bitwise NOT (~) instead of logical NOT (!).

Not negating the flag when needed.

The logical NOT operator ! negates the boolean value of flag.

4fill in blank

hard

Fill both blanks to create a condition that is true only if a is positive and b is not zero.

C++

if ((a [1] 0) [2] (b != 0)) {
    // code here
}

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

A>

B&&

C||

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using logical OR (||) instead of AND (&&) when both conditions must be true.

Using less than (<) instead of greater than (>) for positive check.

The condition checks if a is greater than zero and b is not zero using logical AND &&.

5fill in blank

hard

Fill all three blanks to create a condition that is true if x is zero or y is positive and z is false.

C++

if ((x [1] 0) [2] (y [3] 0 && !z)) {
    // action
}

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

A==

B||

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using logical AND (&&) instead of OR (||) between x and y conditions.

Using less than (<) instead of greater than (>) for y check.

The condition checks if x equals zero or (y is greater than zero and z is false).