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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)
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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

Tarefa

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

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Seção 3. Capítulo 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

Tarefa

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

Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
Tudo estava claro?

Como podemos melhorá-lo?

Obrigado pelo seu feedback!

Seção 3. Capítulo 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

Tarefa

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

Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
Tudo estava claro?

Como podemos melhorá-lo?

Obrigado pelo seu 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

Tarefa

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

Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
Seção 3. Capítulo 27
Switch to desktopMude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo
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