// Assuming the user wants to extract the leftmost 'n' characters from a string or array

​

// For string:

const str = "Hello World";

const n = 5;

const leftSubstring = str.substring(0, n);

console.log(leftSubstring); // Output: "Hello"

​

// For array:

const arr = [1, 2, 3, 4, 5];

const leftElements = arr.slice(0, n);

console.log(leftElements); // Output: [1, 2, 3, 4, 5]