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JS Strings
You can use quotes inside a string, as long as they don't match the quotes surrounding the string:
Example
let answer1 = "It's alright";
let answer2 = "He is called 'Johnny'";
let answer3 = 'He is called
"Johnny"';
String Length
To find the length of a string, use the built-in length
property:
Example
let text = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
text.length; // Will return 26
Escape Character
Because strings must be written within quotes, JavaScript will misunderstand this string:
let text = "We are the so-called
"Vikings" from the
north.";
The string will be chopped to "We are the so-called ".
The solution to avoid this problem, is to use the backslash escape character.
The backslash (\) escape character turns special characters
into string characters:
| Code | Result | Description |
|---|---|---|
| \' | ' | Single quote |
| \" | " | Double quote |
| \\ | \ | Backslash |
The sequence \" inserts a double quote in a string:
Example
let text = "We are the so-called \"Vikings\" from
the north.";
The sequence \' inserts a single quote in a string:
Example
let text= 'It\'s alright.';
The sequence \\ inserts a backslash in a string:
Example
let text = "The character \\ is called
backslash.";
Six other escape sequences are valid in JavaScript:
| Code | Result |
|---|---|
| \b | Backspace |
| \f | Form Feed |
| \n | New Line |
| \r | Carriage Return |
| \t | Horizontal Tabulator |
| \v | Vertical Tabulator |