Node.js | slice() function

Last Updated : 30 Aug, 2019

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 thress 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 od sub-string.

Return type: The function returns the substring.

The program below demonstrates the working of the function:

Program 1:

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

Output:

GeeksforGeeks

Program 2:

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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