Course Content

C++ Introduction

1. Getting Started

Introduction to C++ Programming Entry Point of a C++ Program Understanding the Standard Library and Files in C++Exploring C++ Preprocessor Directives Writing Your First C++ Program

2. Introduction to Operators

Mastering C++ Operators Arithmetic Operators Practice Relational Operators Logical Operators

3. Variables and Data Types

Data Types Understanding Variables Numerical Data Types Introduction to String Introduction to Arrays Working with the Array

4. Introduction to Program Flow

Conditional Statements Ternary Operator Switch Statement While Loop For Loop Practicing With Loops

5. Introduction to Functions

What are Functions?Type of Functions Return Statement in Functions Simple Function Practice

Return Statement in Functions

The return statement terminates the execution of a function and returns a value of a predefined type.

function


              12345
            
int func() // int - predefined
{
    int variable = 10; 
	return variable; // variable = 10
}

If the type is specified incorrectly, the function will behave unpredictably.

main


              12345678910111213
            
#include <iostream>

unsigned short func() 
{
	return -10;
}

//The unsigned short data type has no negative values.

int main()
{
	std::cout << func() << std::endl;
}

That is, before creating a function, the type of data that it returns must be specified. Also, in C++, there are special void functions. Functions of this data type are allowed to return nothing:

first_example

second_example


              12345678910111213
            
#include <iostream>

void voidFunction()
{
	std::cout << "It's void function!" << std::endl;

	//function without return
}

int main()
{
	voidFunction();
}

There can be multiple returns inside functions, and each one will only fire under certain conditions.

main


              123456789101112131415161718192021
            
#include <iostream>

int func()
{
	int a = 50;
	int b = 6;

	if (a > b) //if a > b, func will return a
	{
		return a;
	}
	else       //otherwise func will return b
	{
		return b;
	}
}

int main()
{
	std::cout << func() << std::endl; //func calling
}

If there are two returns, the second return function will be ignored:

main


              12345678910111213141516
            
#include <iostream>

int func()
{
	int a = 50;
	int b = 6;

	return a;
	return b;
}

int main()
{
	std::cout << func() << std::endl; //func calling
}

Everything was clear?

Thanks for your feedback!

Section 5. Chapter 3

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Course Content

C++ Introduction

1. Getting Started

Introduction to C++ Programming Entry Point of a C++ Program Understanding the Standard Library and Files in C++Exploring C++ Preprocessor Directives Writing Your First C++ Program

2. Introduction to Operators

Mastering C++ Operators Arithmetic Operators Practice Relational Operators Logical Operators

3. Variables and Data Types

Data Types Understanding Variables Numerical Data Types Introduction to String Introduction to Arrays Working with the Array

4. Introduction to Program Flow

Conditional Statements Ternary Operator Switch Statement While Loop For Loop Practicing With Loops

5. Introduction to Functions

What are Functions?Type of Functions Return Statement in Functions Simple Function Practice

Return Statement in Functions

The return statement terminates the execution of a function and returns a value of a predefined type.

function


              12345
            
int func() // int - predefined
{
    int variable = 10; 
	return variable; // variable = 10
}

If the type is specified incorrectly, the function will behave unpredictably.

main


              12345678910111213
            
#include <iostream>

unsigned short func() 
{
	return -10;
}

//The unsigned short data type has no negative values.

int main()
{
	std::cout << func() << std::endl;
}

first_example

second_example


              12345678910111213
            
#include <iostream>

void voidFunction()
{
	std::cout << "It's void function!" << std::endl;

	//function without return
}

int main()
{
	voidFunction();
}

There can be multiple returns inside functions, and each one will only fire under certain conditions.

main


              123456789101112131415161718192021
            
#include <iostream>

int func()
{
	int a = 50;
	int b = 6;

	if (a > b) //if a > b, func will return a
	{
		return a;
	}
	else       //otherwise func will return b
	{
		return b;
	}
}

int main()
{
	std::cout << func() << std::endl; //func calling
}

If there are two returns, the second return function will be ignored:

main


              12345678910111213141516
            
#include <iostream>

int func()
{
	int a = 50;
	int b = 6;

	return a;
	return b;
}

int main()
{
	std::cout << func() << std::endl; //func calling
}

Everything was clear?

Thanks for your feedback!

Section 5. Chapter 3