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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

bookJavaScript and Type Conversion

JavaScript is a dynamic-type language:

We can assign any type of value to a variable. We can also change the type of a variable at any time and any position in the code. Let’s say we have assigned a string value to a variable, and then we want to change the type of that variable to a number.


              
123

            
let totalPrice = "thousand";
totalPrice = 1000;
console.log(totalPrice);
copy

Tarea

A variable named totalDaysInMonth with the assigned string value of thirty has been given to you. Your task is to change the type of the variable from string to a number and display it on the console.

Summary:

  • The number datatype is for all kinds of numbers like integer or floating-point numbers.
  • The boolean variables can only have true or false as their values.
  • The typeof operator allows us to see the type of value stored in a variable.
  • JavaScript is a dynamic-type language, so we can change the type of data in it.

Switch to desktopCambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones
¿Todo estuvo claro?

¿Cómo podemos mejorarlo?

¡Gracias por tus comentarios!

Sección 3. Capítulo 3
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bookJavaScript and Type Conversion

JavaScript is a dynamic-type language:

We can assign any type of value to a variable. We can also change the type of a variable at any time and any position in the code. Let’s say we have assigned a string value to a variable, and then we want to change the type of that variable to a number.


              
123

            
let totalPrice = "thousand";
totalPrice = 1000;
console.log(totalPrice);
copy

Tarea

A variable named totalDaysInMonth with the assigned string value of thirty has been given to you. Your task is to change the type of the variable from string to a number and display it on the console.

Summary:

  • The number datatype is for all kinds of numbers like integer or floating-point numbers.
  • The boolean variables can only have true or false as their values.
  • The typeof operator allows us to see the type of value stored in a variable.
  • JavaScript is a dynamic-type language, so we can change the type of data in it.

Switch to desktopCambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones
¿Todo estuvo claro?

¿Cómo podemos mejorarlo?

¡Gracias por tus comentarios!

Sección 3. Capítulo 3
toggle bottom row

bookJavaScript and Type Conversion

JavaScript is a dynamic-type language:

We can assign any type of value to a variable. We can also change the type of a variable at any time and any position in the code. Let’s say we have assigned a string value to a variable, and then we want to change the type of that variable to a number.


              
123

            
let totalPrice = "thousand";
totalPrice = 1000;
console.log(totalPrice);
copy

Tarea

A variable named totalDaysInMonth with the assigned string value of thirty has been given to you. Your task is to change the type of the variable from string to a number and display it on the console.

Summary:

  • The number datatype is for all kinds of numbers like integer or floating-point numbers.
  • The boolean variables can only have true or false as their values.
  • The typeof operator allows us to see the type of value stored in a variable.
  • JavaScript is a dynamic-type language, so we can change the type of data in it.

Switch to desktopCambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones
¿Todo estuvo claro?

¿Cómo podemos mejorarlo?

¡Gracias por tus comentarios!

JavaScript is a dynamic-type language:

We can assign any type of value to a variable. We can also change the type of a variable at any time and any position in the code. Let’s say we have assigned a string value to a variable, and then we want to change the type of that variable to a number.


              
123

            
let totalPrice = "thousand";
totalPrice = 1000;
console.log(totalPrice);
copy

Tarea

A variable named totalDaysInMonth with the assigned string value of thirty has been given to you. Your task is to change the type of the variable from string to a number and display it on the console.

Summary:

  • The number datatype is for all kinds of numbers like integer or floating-point numbers.
  • The boolean variables can only have true or false as their values.
  • The typeof operator allows us to see the type of value stored in a variable.
  • JavaScript is a dynamic-type language, so we can change the type of data in it.

Switch to desktopCambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones
Sección 3. Capítulo 3
Switch to desktopCambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones
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