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Introduction to JavaScript

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Naming Identifiers

Good practices for naming identifier

  • Though you can name identifiers in any way you want, it’s a good practice to give a descriptive identifier name.

  • Names should be logical.

  • If you are using an identifier for a variable to store the number of students, it is better to use students, numberOfStudents, or number_of_students rather than x or n.


              
1234567891011

            
//valid but not preferable
let n = 10;
console.log(n);

// clear and descriptive name
let numberOfStudents = 10;
console.log(numberOfStudents);

//clear and descriptive name
let number_of_students = 10;
console.log(number_of_students);
copy

In both cases, the output is the same but the second and the third identifiers are more meaningful.

Compito

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Declare a variable, using the const keyword, with the identifier numberOfEmployees and assign the value 50 to that variable and print the value of the variable on the console using the console.log() function.

Soluzione

Summary

  • Identifiers are names for the variables, arrays, functions, objects, and classes.

  • The identifier should follow the above rule.

  • Identifiers should have descriptive names.

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Tutto è chiaro?

Come possiamo migliorarlo?

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Sezione 2. Capitolo 5

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book
Naming Identifiers

Good practices for naming identifier

  • Though you can name identifiers in any way you want, it’s a good practice to give a descriptive identifier name.

  • Names should be logical.

  • If you are using an identifier for a variable to store the number of students, it is better to use students, numberOfStudents, or number_of_students rather than x or n.


              
1234567891011

            
//valid but not preferable
let n = 10;
console.log(n);

// clear and descriptive name
let numberOfStudents = 10;
console.log(numberOfStudents);

//clear and descriptive name
let number_of_students = 10;
console.log(number_of_students);
copy

In both cases, the output is the same but the second and the third identifiers are more meaningful.

Compito

Swipe to start coding

Declare a variable, using the const keyword, with the identifier numberOfEmployees and assign the value 50 to that variable and print the value of the variable on the console using the console.log() function.

Soluzione

Summary

  • Identifiers are names for the variables, arrays, functions, objects, and classes.

  • The identifier should follow the above rule.

  • Identifiers should have descriptive names.

Switch to desktopCambia al desktop per esercitarti nel mondo realeContinua da dove ti trovi utilizzando una delle opzioni seguenti
Tutto è chiaro?

Come possiamo migliorarlo?

Grazie per i tuoi commenti!

Sezione 2. Capitolo 5
Switch to desktopCambia al desktop per esercitarti nel mondo realeContinua da dove ti trovi utilizzando una delle opzioni seguenti
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