Contenuti del Corso
Introduction to JavaScript
Introduction to JavaScript
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
Constant 3/3
const Does Not Allow Hoisting
As discussed in the previous chapter, let does not allow hoisting i.e. we cannot use a variable before the declaration. Just like let we can not use hoisting with the const.it is only supported with var.
MYPLANET = 'earth'; console.log(MYPLANET); const MYPLANET;
Compito
Swipe to start coding
Rearrange the following code to display the value of SALARY on the console.
Soluzione
Summary:
- We can neither change the values of the
constvariables through reassignment nor we can redeclare them. - Value should be assigned to
constvariables at the time of declaration.
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Sezione 3. Capitolo 11
Constant 3/3
const Does Not Allow Hoisting
As discussed in the previous chapter, let does not allow hoisting i.e. we cannot use a variable before the declaration. Just like let we can not use hoisting with the const.it is only supported with var.
MYPLANET = 'earth'; console.log(MYPLANET); const MYPLANET;
Compito
Swipe to start coding
Rearrange the following code to display the value of SALARY on the console.
Soluzione
Summary:
- We can neither change the values of the
constvariables through reassignment nor we can redeclare them. - Value should be assigned to
constvariables at the time of declaration.
Cambia al desktop per esercitarti nel mondo realeContinua da dove ti trovi utilizzando una delle opzioni seguentiTutto è chiaro?
Grazie per i tuoi commenti!
Sezione 3. Capitolo 11
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