Course Content

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);

Task

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.

Task

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.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Section 3. Chapter 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);

Task

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.

Task

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.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Section 3. Chapter 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);

Task

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.

Task

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.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

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);

Task

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.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Section 3. Chapter 22

Switch to desktop for real-world practiceContinue from where you are using one of the options below