what is the use of slice() code example

Example 1: javascript slice

//The slice() method extracts a section of a string and returns 
//it as a new string, without modifying the original string.

// same in array but you select elements not characters  


const str = 'The quick brown fox jumps over the lazy dog.';

console.log(str.slice(31));
// expected output: "the lazy dog."

console.log(str.slice(4, 19));
// expected output: "quick brown fox"

console.log(str.slice(-4));
// expected output: "dog."

console.log(str.slice(-9, -5));
// expected output: "lazy"

console.log(str.slice(0, 2)); 
// expected output: "the"
// Up to and including the last index!!!
// Different for python.

Example 2: slice() javascript

let ourString = "Lorem ipsum dolor sit amet, consectetur adipiscing elit.";
ourString.slice(0, 11);
console.log(ourString.slice(0, 11));
//Lorem ipsum

string.slice(start, end);
//Start is required. The position where to begin the extraction. 
//First character is at position 0

//End is optional. 
//The position (up to, but not including) where to end the extraction.