Using cout for output in C++ - Cheat Sheet & Quick Revision

Recall & Review

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What is cout used for in C++?

cout is used to display output on the screen, like printing messages or values.

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How do you print the text Hello, World! using cout?

Use std::cout << "Hello, World!" << std::endl; to print the text and move to a new line.

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What does << mean when used with cout?

<< is called the insertion operator. It sends data to cout to be printed.

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How do you print multiple items with cout?

Use << to chain items, like std::cout << "Age: " << age << std::endl;.

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Why do we use std::endl with cout?

std::endl moves the cursor to the next line and flushes the output buffer, ensuring the output appears immediately.

What does cout do in C++?

A Stores data in memory

B Reads input from the keyboard

C Performs mathematical calculations

D Prints output to the screen

cout is used to print output to the screen.

Which operator is used with cout to display data?

A <<

B ==

C ++

D >>

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

How do you print a new line after output using cout?

A Use <code>;</code>

B Use <code>\n</code> inside the string

C Use <code>std::endl</code>

D Use <code>return</code>

std::endl moves to a new line and flushes the output.

What will this code print?<br>std::cout << "Age: " << 25 << std::endl;

A Age: 25

B 25 Age:

C Age 25

D Error

The code prints the text "Age: " followed by the number 25, then a new line.

Which header file must be included to use cout?

A <code>&lt;string&gt;</code>

B <code>&lt;iostream&gt;</code>

C <code>&lt;vector&gt;</code>

D <code>&lt;cmath&gt;</code>

The <iostream> header provides cout and other input/output features.

Explain how to use cout to print a message and a number on the same line.

Think about chaining multiple items with <<

Describe the role of std::endl when used with cout.

It helps move to the next line and ensures output shows up right away