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Node.js slice() function

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  • Last Updated : 10 Aug, 2022
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The slice() function is a string function of Node.js which is used to extract sub-string from a string. 

Syntax:

    
string.slice( start, end )

Parameters: This function uses three parameters as mentioned above and described below:

  • string: It holds the string content. The substring is extracted from this string.
  • start: This parameter holds the starting index of sub-string.
  • end: This parameter holds the ending index of sub-string.

Return type: The function returns the substring. The program below demonstrates the working of the function: 

Program 1: 

javascript




function findsubstr(str) {
     
    var index = str.slice(12, 25);
     
    console.log(index);
}
 
var str = "Welcome to GeeksforGeeks";
 
findsubstr(str);


Output:

GeeksforGeeks

Program 2: 

javascript




function findsubstr(str, start, end) {
     
    var index = str.slice(start, end);
     
    console.log(index);
}
 
var str = "Welcome to GeeksforGeeks";
 
var start = 0;
var end = 6;
 
findsubstr(str, start, end);


Output:

Welcome
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