Course Content

Introduction to C++

1. Basics

2. Variables

Types of Variables Identifiers User Input Strings Simple Math Not Simple Math Increment (Prefix and Postfix)Constant Challenge

3. Conditional Statements

Booleans If Expression More Logical Operators Else Expression Else If Expression Short Forms Challenge Switch Statement The Keyword Default

4. Loops

While Loop Do/While Loop For Loop Break/Continue Statements

5. Intro to Arrays

Basic Concept of the Array Loops in Arrays Manipulations with Arrays Challenge

User Input

We already know how to output the data with the object cout and operator <<. However, sometimes we need to get values directly from the user. To enable this operation use cin in combination with the extraction operator >>.

For example, here we want to get the value for the variable a and output it:


              123456789101112131415161718
            
01   #include <iostream>
 02   using namespace std;
 03   
 04   int main() {
 05       // Declare the variable
 06       int a;

 07       // Print the message for user to get the value
 08       cout << "Print a number: ";

 09       // Get user input
 10       cin >> a;

 11       // Display the input of the user
 12       cout << "Your number is: " << a;
 13 
 14       return 0;
 15   }

In the line #9 the user print the value which will be stored in the variable a.

Task

Let’s write the simple code to output the age of the user.

Declare the variable age type of int.
Get the value from the user which will be stored in the variable age.
Display the variable age.

Don’t forget about semicolon ; at the end of statements.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 2. Chapter 3

User Input

For example, here we want to get the value for the variable a and output it:


              123456789101112131415161718
            
01   #include <iostream>
 02   using namespace std;
 03   
 04   int main() {
 05       // Declare the variable
 06       int a;

 07       // Print the message for user to get the value
 08       cout << "Print a number: ";

 09       // Get user input
 10       cin >> a;

 11       // Display the input of the user
 12       cout << "Your number is: " << a;
 13 
 14       return 0;
 15   }

In the line #9 the user print the value which will be stored in the variable a.

Task

Let’s write the simple code to output the age of the user.

Declare the variable age type of int.
Get the value from the user which will be stored in the variable age.
Display the variable age.

Don’t forget about semicolon ; at the end of statements.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 2. Chapter 3

User Input

For example, here we want to get the value for the variable a and output it:


              123456789101112131415161718
            
01   #include <iostream>
 02   using namespace std;
 03   
 04   int main() {
 05       // Declare the variable
 06       int a;

 07       // Print the message for user to get the value
 08       cout << "Print a number: ";

 09       // Get user input
 10       cin >> a;

 11       // Display the input of the user
 12       cout << "Your number is: " << a;
 13 
 14       return 0;
 15   }

In the line #9 the user print the value which will be stored in the variable a.

Task

Let’s write the simple code to output the age of the user.

Declare the variable age type of int.
Get the value from the user which will be stored in the variable age.
Display the variable age.

Don’t forget about semicolon ; at the end of statements.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

For example, here we want to get the value for the variable a and output it:


              123456789101112131415161718
            
01   #include <iostream>
 02   using namespace std;
 03   
 04   int main() {
 05       // Declare the variable
 06       int a;

 07       // Print the message for user to get the value
 08       cout << "Print a number: ";

 09       // Get user input
 10       cin >> a;

 11       // Display the input of the user
 12       cout << "Your number is: " << a;
 13 
 14       return 0;
 15   }

In the line #9 the user print the value which will be stored in the variable a.

Task

Let’s write the simple code to output the age of the user.

Declare the variable age type of int.
Get the value from the user which will be stored in the variable age.
Display the variable age.

Don’t forget about semicolon ; at the end of statements.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Section 2. Chapter 3

Switch to desktop for real-world practiceContinue from where you are using one of the options below