Node.js indexOf() function
The indexOf() function is a string function from Node.js which is used to find a string with another string.
Syntax:
str1.indexOf( str2 )
Parameter: This function uses two parameters as mentioned above and described below:
- str1: It holds the string content where another string is to be searched.
- str2: It holds the search string.
Return Value: The function returns the index of the passed parameter. The below programs demonstrate the working of the indexOf() function:
Example 1:
javascript
function findIndex(str) { let index = str.indexOf("awesome"); console.log(index);}const str = "gfg is awesome";findIndex(str); |
Output:
7
Example 2:
javascript
function findIndex(str1, str2) { let index = str1.indexOf(str2); console.log(index);}const str1 = "Welcome to w3wiki";const str2 = "to"findIndex(str1, str2); |
Output:
8