Nested conditional statements in C++ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if a number is positive.

C++

#include <iostream>
int main() {
    int num = 5;
    if (num [1] 0) {
        std::cout << "Positive" << std::endl;
    }
    return 0;
}

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 'num > 0' checks if the number is positive.

2fill in blank

medium

Complete the code to check if a number is between 1 and 10 (inclusive).

C++

#include <iostream>
int main() {
    int num = 7;
    if (num [1] 1 && num [2] 10) {
        std::cout << "In range" << std::endl;
    }
    return 0;
}

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

A>=

B<=

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>' or '<' excludes the boundary numbers.

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

The condition 'num >= 1 && num <= 10' checks if num is between 1 and 10 inclusive.

3fill in blank

hard

Fix the error in the nested if statement to check if a number is positive and even.

C++

#include <iostream>
int main() {
    int num = 4;
    if (num > 0) {
        if (num [1] 2 == 0) {
            std::cout << "Positive and even" << std::endl;
        }
    }
    return 0;
}

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 evenness.

Using '*' or '+' are arithmetic operations unrelated to checking evenness.

The modulus operator '%' checks if the remainder is zero, meaning the number is even.

4fill in blank

hard

Fill both blanks to complete the nested conditional that prints if a number is positive and divisible by 3.

C++

#include <iostream>
int main() {
    int num = 9;
    if (num [1] 0) {
        if (num [2] 3 == 0) {
            std::cout << "Positive and divisible by 3" << std::endl;
        }
    }
    return 0;
}

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

A>

B<

C%

D/

Attempts:

3 left

💡 Hint

Common Mistakes

Using '<' instead of '>' for positivity.

Using '/' instead of '%' for divisibility check.

The first condition checks if num is greater than 0, the second uses '%' to check divisibility by 3.

5fill in blank

hard

Fill all three blanks to create a nested conditional that prints if a number is negative, odd, and less than -10.

C++

#include <iostream>
int main() {
    int num = -15;
    if (num [1] 0) {
        if (num [2] 2 != 0) {
            if (num [3] -10) {
                std::cout << "Negative, odd, and less than -10" << std::endl;
            }
        }
    }
    return 0;
}

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

A<

B%

D>

Attempts:

3 left

💡 Hint

Common Mistakes

Using '>' instead of '<' for negativity or less than -10.

Using '/' instead of '%' for oddness check.

The first condition checks if num is less than 0 (negative), the second uses '%' to check oddness, the third checks if num is less than -10.