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Introduction to C++
course content

Course Content

Introduction to C++

Introduction to C++

1. Basics
Get StartedOutputNew LinesComments
2. Variables
Types of VariablesIdentifiersUser InputStringsSimple MathNot Simple MathIncrement (Prefix and Postfix)ConstantChallenge
3. Conditional Statements
BooleansIf ExpressionMore Logical OperatorsElse ExpressionElse If ExpressionShort FormsChallengeSwitch StatementThe Keyword Default
4. Loops
While LoopDo/While LoopFor LoopBreak/Continue Statements
5. Intro to Arrays
Basic Concept of the ArrayLoops in ArraysManipulations with ArraysChallenge

bookComments

Comments in programming are parts of code that are ignored. It’s a good rule to use them to improve the readability of your code with specific descriptions of what a certain part of the code does. Comments also help when you want to test a certain part of the program without deleting the other code.

To mark the line(or part of the line) as a comment, begin the respective string with //.

For example, in this case, the line which outputs the message "Hello!" will be ignored:


              
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#include <iostream>
using namespace std;
 
int main() {
 &nbsp&nbsp&nbsp&nbsp // cout << "Hello! \n";
 &nbsp&nbsp&nbsp&nbsp cout << "I love C++! ";
 &nbsp&nbsp&nbsp&nbsp cout << "Goodbye!";
&nbsp&nbsp&nbsp&nbspreturn 0;
}
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This type of comment is also good for code explanation:

If you want the compiler to ignore several lines use multi-line comments. They start with /* and end with */:


              
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#include &lt;iostream&gt;
using namespace std;
 
int main() {
 &nbsp&nbsp&nbsp&nbsp&nbsp/* cout << "Hello!";
 &nbsp&nbsp&nbsp&nbsp cout << "I love C++! "; */ 
 &nbsp&nbsp&nbsp&nbsp cout << "Goodbye!";  // Print the message
 &nbsp&nbsp&nbsp&nbsp return 0;
}
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question-icon

The code must only print the message: "I have learned C++ basics!". Fill gaps in the code:

#include <iostream>
using namespace std;

int main() {
     cout << "Hello!\n";
    cout << "World!\n";
    cout << "I have learned C++ basics! \n";   Print the message
    return 0;
}
I’m learning C++!

Click or drag`n`drop items and fill in the blanks

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Section 1. Chapter 4
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