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C++ Introduction
course content

Course Content

C++ Introduction

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 OperatorPracticing 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

bookSimple Operators

The assignment operator (=) is used in programming to assign a value to a variable. The syntax looks as follows:

cpp

main

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#include<iostream>

int main()
{
	int myVar = 9;
	int yourVar;

	yourVar = myVar; //assign yourVar the value of myVar

	std::cout << myVar << std::endl << yourVar;
}

It works exactly the same with the string data type:

cpp

main

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#include <iostream>
#include <string>

int main()
{
	std::string myVar = "codefinity";
	std::string yourVar;

	yourVar = myVar; //assign yourVar the value of myVar

	std::cout << myVar << std::endl;
	std::cout << yourVar << std::endl;
}

The equality (==) and inequality (!=) operators are used to numerically compare 2 variables:

cpp

main

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#include <iostream>

int main()
{
	int var = 9;
	int yourVar = (var == 9);
	int myVar = (var == -9);

  	std::cout << yourVar << std::endl; 
	std::cout << myVar << std::endl;
}

Why 1 and 0? This is an alternative approach for utilizing the boolean data type. When the expression var == 9 is true, it is represented as 1, and it means that var is indeed equal to the number 9. Conversely, when the expression var == -9 is false, it is represented as 0, indicating that var is not equal to the number -9.

The inequality (!=) operator is doing exactly the opposite:

cpp

main

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#include<iostream>

int main()
{
	int var = 9;

	//if var is equal 9, then 0 (false)
	int yourVar = (var != 9);

	//if var is not equal -9, then 1 (true)
	int myVar = (var != -9);

  	std::cout << yourVar << std::endl;
	std::cout << myVar << std::endl;
}

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Section 3. Chapter 1
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