Basic formatting in C++ - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of std::cout in C++?

std::cout is used to print output to the console (screen). It helps us show messages or results to the user.

beginner

How do you print a new line in C++ using std::cout?

You can print a new line by using \n inside the string or by using std::endl after the output.

beginner

What does this code print?<br>

std::cout << "Hello" << " " << "World!" << std::endl;

This prints: Hello World! followed by a new line.

intermediate

What is the difference between \n and std::endl in C++ output?

\n adds a new line character but does not flush the output buffer immediately.<br>std::endl adds a new line and also flushes the output buffer, making sure output appears right away.

beginner

How can you print variables with text in C++ using std::cout?

You can use the insertion operator << to combine text and variables. For example:<br>int age = 25;<br>std::cout << "Age: " << age << std::endl;

Which of these prints a new line in C++?

A std::cout << "\n";

B std::cout << "newline";

C std::cout << "\t";

D std::cout << "space";

\n is the new line character. It moves the cursor to the next line.

What does std::endl do besides adding a new line?

A Adds a tab space

B Flushes the output buffer

C Ends the program

D Starts a new program

std::endl adds a new line and flushes the output buffer to show output immediately.

How do you print the value of an integer variable num with text?

A std::cout << "Number: " << num << std::endl;

B print("Number: " + num);

C echo "Number: " num;

D cout << num + "Number";

Use std::cout with << to combine text and variables.

What symbol is used to send output to the console in C++?

A ==

B >>

C <<

D //

The insertion operator << sends data to std::cout for output.

Which line correctly prints "Hello World!" followed by a new line?

A print("Hello World!\n");

B std::cout >> "Hello World!";

C echo "Hello World!";

D std::cout << "Hello World!" << std::endl;

Option D uses correct C++ syntax for printing with a new line.

Explain how to print text and variables together in C++ using std::cout.

Think about how you join strings and numbers in one output line.

Describe the difference between using \n and std::endl for new lines in C++ output.

Consider what happens behind the scenes when output is shown.