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Please enable JavaScript in your browser settings or update your browser.Symbols 1/3 | Data Types and Variables
Introduction to JavaScript (staging)
course content

Course Content

Introduction to JavaScript (staging)

Introduction to JavaScript (staging)

1. Introduction
Writing our first codeOutput Using Variables 1/2Output Using Variables 2/2
2. JavaScript syntax
JavaScript SyntaxJavaScript VariablesJavaScript OperatorsIdentifiers in JavaScriptNaming IdentifiersReserved keywords in JavaScriptNaming Convention in JavaScript. Case StylesVariables Naming ConventionBoolean Naming ConventionConstant Naming ConventionFunction & Classes Naming ConventionMultiline StringsMultiline Strings. ConcatenatingCommenting in JavaScriptCommenting in JavaScript. Multi-line Comments
3. Data Types and Variables
What are Variables?What are Data-types?JavaScript and Type ConversionVar 1/3Var 2/3Var 3/3Let 1/2Let 2/2Constant 1/3Constant 2/3Constant 3/3Number 1/3Number 2/3Number 3/3Boolean 1/4Boolean 2/4Boolean 3/4Boolean 4/4Strings 1/5Strings 2/5Strings 3/5Strings 4/5Strings 5/5BigInt 1/3BigInt 2/3BigInt 3/3Symbols 1/3Symbols 2/3Symbols 3/3NullUndefinedNull vs Undefined

bookSymbols 1/3

The symbol is a primitive data type that is used to create a unique identifier. Symbols are unchallengeable and unique.

Creation of symbols

We use the global Symbol() function to create a new symbol. We will work briefly with the functions in the later section but you have to learn that to create a primitive symbol we will use Symbol().


              
12

            
let s = Symbol('foo');
console.log(s.toString());
copy

Note: Symbol variable should be converted to string if you want to use it as a string value. That can be done by using .toString() method.

A unique value is created every time the Symbol() function is called or used and these values are not equal to each other (they are unique).


              
1

            
console.log(Symbol() === Symbol());
copy

Even when we pass equal arguments, the result is still different, for example:


              
1

            
console.log(Symbol('Berlin') == Symbol('Berlin'));
copy

Task

You have to check that Symbol('Monaco') and Symbol('Istanbul') are equal or not and display the result on the console.

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 3. Chapter 27
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bookSymbols 1/3

The symbol is a primitive data type that is used to create a unique identifier. Symbols are unchallengeable and unique.

Creation of symbols

We use the global Symbol() function to create a new symbol. We will work briefly with the functions in the later section but you have to learn that to create a primitive symbol we will use Symbol().


              
12

            
let s = Symbol('foo');
console.log(s.toString());
copy

Note: Symbol variable should be converted to string if you want to use it as a string value. That can be done by using .toString() method.

A unique value is created every time the Symbol() function is called or used and these values are not equal to each other (they are unique).


              
1

            
console.log(Symbol() === Symbol());
copy

Even when we pass equal arguments, the result is still different, for example:


              
1

            
console.log(Symbol('Berlin') == Symbol('Berlin'));
copy

Task

You have to check that Symbol('Monaco') and Symbol('Istanbul') are equal or not and display the result on the console.

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 3. Chapter 27
toggle bottom row

bookSymbols 1/3

The symbol is a primitive data type that is used to create a unique identifier. Symbols are unchallengeable and unique.

Creation of symbols

We use the global Symbol() function to create a new symbol. We will work briefly with the functions in the later section but you have to learn that to create a primitive symbol we will use Symbol().


              
12

            
let s = Symbol('foo');
console.log(s.toString());
copy

Note: Symbol variable should be converted to string if you want to use it as a string value. That can be done by using .toString() method.

A unique value is created every time the Symbol() function is called or used and these values are not equal to each other (they are unique).


              
1

            
console.log(Symbol() === Symbol());
copy

Even when we pass equal arguments, the result is still different, for example:


              
1

            
console.log(Symbol('Berlin') == Symbol('Berlin'));
copy

Task

You have to check that Symbol('Monaco') and Symbol('Istanbul') are equal or not and display the result on the console.

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 symbol is a primitive data type that is used to create a unique identifier. Symbols are unchallengeable and unique.

Creation of symbols

We use the global Symbol() function to create a new symbol. We will work briefly with the functions in the later section but you have to learn that to create a primitive symbol we will use Symbol().


              
12

            
let s = Symbol('foo');
console.log(s.toString());
copy

Note: Symbol variable should be converted to string if you want to use it as a string value. That can be done by using .toString() method.

A unique value is created every time the Symbol() function is called or used and these values are not equal to each other (they are unique).


              
1

            
console.log(Symbol() === Symbol());
copy

Even when we pass equal arguments, the result is still different, for example:


              
1

            
console.log(Symbol('Berlin') == Symbol('Berlin'));
copy

Task

You have to check that Symbol('Monaco') and Symbol('Istanbul') are equal or not and display the result on the console.

Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
Section 3. Chapter 27
Switch to desktopSwitch to desktop for real-world practiceContinue from where you are using one of the options below
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