The **string.includes() method** is used to find out if a string contains a particular substring. It **returns** `true` if the substring is found and `false` otherwise.

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# Syntax

The first parameter is the *case-sensitive substring* we are looking for, and the second *optional* parameter is the *index* (inclusive) from which we start our search. Indices start from 0 to n-1. We call this method on the string to be searched.

1. `str.includes("hello");`
2. Using optional parameter: `str.includes("world", 5);`

var str = "My name is Arya Stark";

if(str.includes("Arya")){
    console.log("word found.");
}
else{
    console.log("word NOT found");
}

var str = "I am Lord Varys";

if(str.includes("Lord", 6)){
    console.log("word found.");
}
else{
    console.log("word NOT found");
}

What is String.includes() method in JavaScript?

Determines if a string contains a substring, case-sensitive, with an optional start index parameter.

What is String.includes() method in JavaScript?

Syntax

Examples