Switch vs if comparison in C++ - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "One" when the variable num is 1.

C++

int num = 1;
switch (num) {
    case [1]:
        std::cout << "One" << std::endl;
        break;
    default:
        std::cout << "Other" << std::endl;
}

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

A1

B2

C0

Ddefault

Attempts:

3 left

💡 Hint

Common Mistakes

Using a case label that does not match the variable value.

Using 'default' as a case label.

The case label must match the value of num to execute the correct block. Here, case 1: matches num = 1.

2fill in blank

medium

Complete the if statement to print "Two" when num equals 2.

C++

int num = 2;
if (num [1] 2) {
    std::cout << "Two" << std::endl;
} else {
    std::cout << "Not Two" << std::endl;
}

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

A!=

B<

C>

D==

Attempts:

3 left

💡 Hint

Common Mistakes

Using assignment operator '=' instead of comparison '=='.

Using inequality operator '!='.

The equality operator == checks if num is equal to 2.

3fill in blank

hard

Fix the error in the switch statement to correctly handle the variable grade.

C++

char grade = 'B';
switch (grade) {
    case [1]:
        std::cout << "Good" << std::endl;
        break;
    default:
        std::cout << "Other grade" << std::endl;
}

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

A"B"

B'B'

CB

D"b"

Attempts:

3 left

💡 Hint

Common Mistakes

Using double quotes instead of single quotes for characters.

Using unquoted letters.

Character constants in C++ use single quotes. Double quotes are for strings.

4fill in blank

hard

Fill both blanks to create a map from numbers to words using if statements.

C++

int num = 3;
if (num [1] 1) {
    std::cout << "One" << std::endl;
} else if (num [2] 3) {
    std::cout << "Three" << std::endl;
} else {
    std::cout << "Other" << std::endl;
}

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

A==

B!=

C>

D<

Attempts:

3 left

💡 Hint

Common Mistakes

Using inequality operator '!=' instead of '=='.

Using greater or less than operators incorrectly.

Use the equality operator == to check if num equals 1 or 3.

5fill in blank

hard

Fill all three blanks to create a switch statement that prints the day of the week for 1, 2, and 3.

C++

int day = 2;
switch (day) {
    case [1]:
        std::cout << "Monday" << std::endl;
        break;
    case [2]:
        std::cout << "Tuesday" << std::endl;
        break;
    case [3]:
        std::cout << "Wednesday" << std::endl;
        break;
    default:
        std::cout << "Other day" << std::endl;
}

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

A1

B2

C3

D4

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong numbers for case labels.

Missing break statements (though not asked here).

The case labels must match the values 1, 2, and 3 to print the correct day.