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C++ Conditional Statements
course content

Course Content

C++ Conditional Statements

C++ Conditional Statements

1. Introduction to Conditional Statements
What is Control FlowThe Role of Conditional StatementsIf StatementElse StatementNested If StatementsSwitch Statement
2. Conditional Control Flow Practice
ParallelogramLevel of KnowledgeWhich TriangleCalculate Shipping Cost
3. Advanced Topics
Ternary OperatorGuard ClauseSummary and Overview

bookIf Statement

The if statement is a foundational building block of control flow in most programming languages. It allows a program to make decisions and execute different blocks of code based on whether a given condition is true or false. The idea behind if statements is simple: If a condition is met, do something, otherwise, don’t.

Here is the if statement syntax:

  • condition is a boolean expression that evaluates to either true or false;
  • If the condition is true, the code inside the curly braces { } is executed;
  • If the condition is false, the code inside the if block is skipped, and program execution continues with the next statement after the if block.
cpp

main

copy

              
123456789101112

            
#include <iostream>

int main() 
{
    int age = 33; // declaring and initializing a variable
    
    if (age >= 18) // checking whether the age is greater or equal to 18
    {
		// if so, output the message
        std::cout << "You are an adult" << std::endl;
    }
}

If you have an if statement with only one statement to be executed when the condition is true, you can omit the curly braces { }. For example:

Note

The condition within an if statement requires a bool type. As you may be aware from C++ Data Types course, you can obtain a bool type by performing complex operations using || (logical OR) and && (logical AND). Therefore, the condition in an if statement can also consist of these complex operations.

Task
test

Swipe to show code editor

  • Check if a two dimensional square with x (length) and y (height) can fit into another square with dimensions x1 (length) and y1 (height).
  • Output Can fit in console if it can.

Once you've completed this task, click the button below the code to check your solution.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

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Section 1. Chapter 3
toggle bottom row

bookIf Statement

The if statement is a foundational building block of control flow in most programming languages. It allows a program to make decisions and execute different blocks of code based on whether a given condition is true or false. The idea behind if statements is simple: If a condition is met, do something, otherwise, don’t.

Here is the if statement syntax:

  • condition is a boolean expression that evaluates to either true or false;
  • If the condition is true, the code inside the curly braces { } is executed;
  • If the condition is false, the code inside the if block is skipped, and program execution continues with the next statement after the if block.
cpp

main

copy

              
123456789101112

            
#include <iostream>

int main() 
{
    int age = 33; // declaring and initializing a variable
    
    if (age >= 18) // checking whether the age is greater or equal to 18
    {
		// if so, output the message
        std::cout << "You are an adult" << std::endl;
    }
}

If you have an if statement with only one statement to be executed when the condition is true, you can omit the curly braces { }. For example:

Note

The condition within an if statement requires a bool type. As you may be aware from C++ Data Types course, you can obtain a bool type by performing complex operations using || (logical OR) and && (logical AND). Therefore, the condition in an if statement can also consist of these complex operations.

Task
test

Swipe to show code editor

  • Check if a two dimensional square with x (length) and y (height) can fit into another square with dimensions x1 (length) and y1 (height).
  • Output Can fit in console if it can.

Once you've completed this task, click the button below the code to check your solution.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

Section 1. Chapter 3
toggle bottom row

bookIf Statement

The if statement is a foundational building block of control flow in most programming languages. It allows a program to make decisions and execute different blocks of code based on whether a given condition is true or false. The idea behind if statements is simple: If a condition is met, do something, otherwise, don’t.

Here is the if statement syntax:

  • condition is a boolean expression that evaluates to either true or false;
  • If the condition is true, the code inside the curly braces { } is executed;
  • If the condition is false, the code inside the if block is skipped, and program execution continues with the next statement after the if block.
cpp

main

copy

              
123456789101112

            
#include <iostream>

int main() 
{
    int age = 33; // declaring and initializing a variable
    
    if (age >= 18) // checking whether the age is greater or equal to 18
    {
		// if so, output the message
        std::cout << "You are an adult" << std::endl;
    }
}

If you have an if statement with only one statement to be executed when the condition is true, you can omit the curly braces { }. For example:

Note

The condition within an if statement requires a bool type. As you may be aware from C++ Data Types course, you can obtain a bool type by performing complex operations using || (logical OR) and && (logical AND). Therefore, the condition in an if statement can also consist of these complex operations.

Task
test

Swipe to show code editor

  • Check if a two dimensional square with x (length) and y (height) can fit into another square with dimensions x1 (length) and y1 (height).
  • Output Can fit in console if it can.

Once you've completed this task, click the button below the code to check your solution.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Everything was clear?

How can we improve it?

Thanks for your feedback!

The if statement is a foundational building block of control flow in most programming languages. It allows a program to make decisions and execute different blocks of code based on whether a given condition is true or false. The idea behind if statements is simple: If a condition is met, do something, otherwise, don’t.

Here is the if statement syntax:

  • condition is a boolean expression that evaluates to either true or false;
  • If the condition is true, the code inside the curly braces { } is executed;
  • If the condition is false, the code inside the if block is skipped, and program execution continues with the next statement after the if block.
cpp

main

copy

              
123456789101112

            
#include <iostream>

int main() 
{
    int age = 33; // declaring and initializing a variable
    
    if (age >= 18) // checking whether the age is greater or equal to 18
    {
		// if so, output the message
        std::cout << "You are an adult" << std::endl;
    }
}

If you have an if statement with only one statement to be executed when the condition is true, you can omit the curly braces { }. For example:

Note

The condition within an if statement requires a bool type. As you may be aware from C++ Data Types course, you can obtain a bool type by performing complex operations using || (logical OR) and && (logical AND). Therefore, the condition in an if statement can also consist of these complex operations.

Task
test

Swipe to show code editor

  • Check if a two dimensional square with x (length) and y (height) can fit into another square with dimensions x1 (length) and y1 (height).
  • Output Can fit in console if it can.

Once you've completed this task, click the button below the code to check your solution.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 1. Chapter 3
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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