If statement in C++ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the number is positive.

C++

int number = 5;
if (number [1] 0) {
    std::cout << "Positive" << std::endl;
}

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

A>

B<

C==

D!=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' will check if the number is negative.

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

Using '!=' checks if number is not zero, which includes negatives.

The '>' operator checks if the number is greater than zero, meaning positive.

2fill in blank

medium

Complete the code to print "Even" if the number is divisible by 2.

C++

int number = 4;
if (number [1] 2 == 0) {
    std::cout << "Even" << std::endl;
}

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

A*

B%

C/

D+

Attempts:

3 left

💡 Hint

Common Mistakes

Using '/' divides the number but does not check remainder.

Using '*' or '+' are arithmetic operations not related to divisibility.

The modulus operator '%' gives the remainder. If remainder is 0 when divided by 2, number is even.

3fill in blank

hard

Fix the error in the if statement to check if x is not equal to 10.

C++

int x = 7;
if (x [1] 10) {
    std::cout << "Not 10" << std::endl;
}

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

A=

B==

C!=

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' causes assignment, not comparison.

Using '==' checks equality, not inequality.

Using '<' checks if less than, not inequality.

The '!=' operator checks if x is not equal to 10. '=' is assignment, not comparison.

4fill in blank

hard

Fill in the blank to print "Adult" if age is 18 or more.

C++

int age = 20;
if (age [1] 18) {
    std::cout << "Adult" << std::endl;
}

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

A<=

B||

C&&

D>=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<=' checks if age is less than or equal to 18, which is opposite.

Using '&&' or '||' incorrectly changes logic.

The '>=' operator checks if age is greater than or equal to 18.

5fill in blank

hard

Fill all three blanks to print "Teenager" if age is between 13 and 19 inclusive.

C++

int age = 15;
if (age [1] 13 [2] age [3] 19) {
    std::cout << "Teenager" << std::endl;
}

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

A>=

B<=

C&&

D||

Attempts:

3 left

💡 Hint

Common Mistakes

Using '||' instead of '&&' allows ages outside the range.

Swapping '>=' and '<=' changes the logic.

Using '=' instead of comparison operators causes errors.

The condition checks if age is greater or equal to 13 AND less or equal to 19 using '>=' , '&&', and '<=' operators.