Зміст курсу

Introduction to JavaScript (staging)

1. Introduction

Writing our first code Output Using Variables 1/2 Output Using Variables 2/2

2. JavaScript syntax

JavaScript Syntax JavaScript Variables JavaScript Operators Identifiers in JavaScript Naming Identifiers Reserved keywords in JavaScript Naming Convention in JavaScript. Case Styles Variables Naming Convention Boolean Naming Convention Constant Naming Convention Function & Classes Naming Convention Multiline Strings Multiline Strings. Concatenating Commenting in JavaScript Commenting in JavaScript. Multi-line Comments

Strings 4/5

Strings are Immutable:

Strings, in JavaScript, are immutable which means that their values cannot be changed once declared.

Let’s try to understand this with an example.


              1234
            
let  stringVariable = 'JavaScript';
// changing the value of first character.
stringVariable[0] = 'A';
console.log(stringVariable[0]);

The value did not change.

To do so, the usual practice is to create a new string variable with the value that we want to change and attach the parts of the older string to it. In this way, we can change the string,


              1234
            
let  str = 'Gi';
// replacing the string G with H
str = 'H' + str[1];
console.log(str);

Завдання

A variable name order with the assigned value of go has been given to you. Your task is to change the value go to to and display it.

Завдання

A variable name order with the assigned value of go has been given to you. Your task is to change the value go to to and display it.

Перейдіть на комп'ютер для реальної практикиПродовжуйте з того місця, де ви зупинились, використовуючи один з наведених нижче варіантів

Все було зрозуміло?

Секція 3. Розділ 22

Strings 4/5

Strings are Immutable:

Strings, in JavaScript, are immutable which means that their values cannot be changed once declared.

Let’s try to understand this with an example.


              1234
            
let  stringVariable = 'JavaScript';
// changing the value of first character.
stringVariable[0] = 'A';
console.log(stringVariable[0]);

The value did not change.

To do so, the usual practice is to create a new string variable with the value that we want to change and attach the parts of the older string to it. In this way, we can change the string,


              1234
            
let  str = 'Gi';
// replacing the string G with H
str = 'H' + str[1];
console.log(str);

Завдання

A variable name order with the assigned value of go has been given to you. Your task is to change the value go to to and display it.

Завдання

A variable name order with the assigned value of go has been given to you. Your task is to change the value go to to and display it.

Все було зрозуміло?

Секція 3. Розділ 22

Strings 4/5

Strings are Immutable:

Strings, in JavaScript, are immutable which means that their values cannot be changed once declared.

Let’s try to understand this with an example.


              1234
            
let  stringVariable = 'JavaScript';
// changing the value of first character.
stringVariable[0] = 'A';
console.log(stringVariable[0]);

The value did not change.

To do so, the usual practice is to create a new string variable with the value that we want to change and attach the parts of the older string to it. In this way, we can change the string,


              1234
            
let  str = 'Gi';
// replacing the string G with H
str = 'H' + str[1];
console.log(str);

Завдання

A variable name order with the assigned value of go has been given to you. Your task is to change the value go to to and display it.

Завдання

A variable name order with the assigned value of go has been given to you. Your task is to change the value go to to and display it.

Все було зрозуміло?

Strings are Immutable:

Strings, in JavaScript, are immutable which means that their values cannot be changed once declared.

Let’s try to understand this with an example.


              1234
            
let  stringVariable = 'JavaScript';
// changing the value of first character.
stringVariable[0] = 'A';
console.log(stringVariable[0]);

The value did not change.

To do so, the usual practice is to create a new string variable with the value that we want to change and attach the parts of the older string to it. In this way, we can change the string,


              1234
            
let  str = 'Gi';
// replacing the string G with H
str = 'H' + str[1];
console.log(str);

Завдання

A variable name order with the assigned value of go has been given to you. Your task is to change the value go to to and display it.

Секція 3. Розділ 22