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C++ Introduction

Type of FunctionsType of Functions

When creating a function, the data type it returns always specified.

In the example of the main function, we see that it has an integer data type, which means that after it finishes its work, it will return an integer value, in our case, the number 0.

Note

Since the main function is reserved in C++, it will always return integer.

But our functions can return any value:

To call a function, you need to write its name with brackets:

cpp

main.cpp

We have created a function that returns a value of 3.14 as a double data type, and we have called this function to display its output on the screen.

Functions can also be string type:

cpp

main.cpp

The typedef is also applicable:

cpp

main.cpp

If you can't exactly specify the return type, the auto operator will force the compiler to do it for you:

cpp

main.cpp

Все було зрозуміло?

Секція 5. Розділ 2
course content

Зміст курсу

C++ Introduction

1. Getting Started

Why to Learn C++What is C++Entry Point of a ProgramStandard Library and FilesPreprocessor DirectivesThe First Program

2. Variables and Data Types

Introduction to VariablesData TypesNumerical Data TypesIntroduction to StringIntroduction to ArraysKeywords sizeof(), auto and typedefWorking with the Array

3. Introduction to Operators

Simple OperatorsA Little MathLogical OperatorsCompound Assignment OperatorBitwise Shift OperatorsPracticing Math Basics

4. Introduction to Program Flow

If...else StatementTernary OperatorSwitch StatementWhile LoopDo...while LoopFor LoopFibonacci Number with Loops

5. Introduction to Functions

What are Functions?Type of FunctionsReturn Statement in FunctionsFunctions With Arguments Simple Function

C++ Introduction

Type of FunctionsType of Functions

When creating a function, the data type it returns always specified.

In the example of the main function, we see that it has an integer data type, which means that after it finishes its work, it will return an integer value, in our case, the number 0.

Note

Since the main function is reserved in C++, it will always return integer.

But our functions can return any value:

To call a function, you need to write its name with brackets:

cpp

main.cpp

We have created a function that returns a value of 3.14 as a double data type, and we have called this function to display its output on the screen.

Functions can also be string type:

cpp

main.cpp

The typedef is also applicable:

cpp

main.cpp

If you can't exactly specify the return type, the auto operator will force the compiler to do it for you:

cpp

main.cpp

Все було зрозуміло?

Секція 5. Розділ 2
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