Using cout for output in C++ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to print "Hello, World!" using cout.

C++

#include <iostream>
int main() {
    std::[1] << "Hello, World!" << std::endl;
    return 0;
}

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

Acerr

Bcin

Ccout

Dclog

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'cin' instead of 'cout' for output.

Using 'cerr' which is for error output, not normal output.

The cout object is used to output text to the console in C++.

2fill in blank

medium

Complete the code to print the value of variable x using cout.

C++

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

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

Astd::endl

B"x"

C5

Dx

Attempts:

3 left

💡 Hint

Common Mistakes

Putting the variable name in quotes, which prints the text instead of the value.

Using a number directly instead of the variable.

To print the value of a variable, use its name without quotes.

3fill in blank

hard

Fix the error in the code to correctly print "Sum: 15" using cout.

C++

#include <iostream>
int main() {
    int a = 7, b = 8;
    std::cout << "Sum: " [1] a + b << 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 '<<' between string and variables.

Using '>>' which is for input, not output.

The insertion operator << is needed to send multiple parts to cout.

4fill in blank

hard

Fill both blanks to print the product of a and b with a message.

C++

#include <iostream>
int main() {
    int a = 4, b = 6;
    std::cout [1] "Product: " [2] a * b << 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 '*' operators instead of '<<' for output chaining.

Using '>>' which is for input.

Use the insertion operator << to send both the string and the product to cout.

5fill in blank

hard

Fill all three blanks to print the sum and difference of x and y.

C++

#include <iostream>
int main() {
    int x = 10, y = 3;
    std::cout [1] "Sum: " [2] x + y << ", Difference: " [3] x - y << 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 output chaining.

Using '>>' which is for input.

Not adding numbers correctly.

Use << to send strings and results to cout.