{% youtube src="https://www.youtube.com/watch?v=qGQmj86A3q4" %} {% endyoutube %}
A string in Javascript is, simply put, a sequence of characters.
We can declare strings just like any other variables. We can use either single quote ' or double quote " (they are completely interchangable).
let aString = "this is a string"
let oString = 'this is other string'
Besides normal characters we can use in a string, some characters, which are either not printable, or not 'type'able can be put into a string using \ (backward slash) escape sequences.
| Code | Output |
|---|---|
\0 |
the NULL character |
\' |
single quote |
\" |
double quote |
\\ |
backslash |
\n |
new line |
\r |
carriage return |
\v |
vertical tab |
\t |
tab |
\b |
backspace |
\f |
form feed |
\uXXXX |
unicode codepoint |
\u{X} ... \u{XXXXXX} |
unicode codepoint |
\xXX |
the Latin-1 character |
An example, if you want to use this as a string - He said, "I am Iron Man"you can declare it as follows
let speech = "He said, \" I am Iron Man\""{% hint style='working' %} Note: This is something that was introduced in ECMAScript 2015, so you'd need browsers / NodeJS editions released mostly after mid-2016 for these to work. {% endhint %}
Template strings allow you to use variables inside strings without having to use the ugly "a" + b + "c" type of notation.
Take an example here -
let firstName = "Arnav"
let lastName = "Gupta"
let bookName = "Blocks of Javascript, by ${lastName}, ${firstName}"
console.log(bookName) // "Blocks of Javascript, by Gupta, Arnav"