learn-array-methods.js

/* let arr = ["India", "Srilanka"];
console.log(arr);
arr.push("Australia"); // adds element to the tail
console.log(arr);
arr.pop(); // removes element from the tail
console.log(arr);
arr.unshift("Zimbombay"); // adds element to the head
console.log(arr);
arr.shift(); // removes element from the head
console.log(arr); */

/* let arr = ["a", "z", "e", "b", "h"];
console.log(arr);
console.log(arr.sort()); // rearrange elements in order
console.log(arr.sort().reverse()); // rearrange elements in reverse order
console.log(arr.join("")); // combines elements  */

//sum of 7 by adding index
let arr = [1, 2, 3, 4, 5, 6];
let final = 7;
console.log(arr);
let temp = [];
for (let i = 0; i < arr.length; i++) {
  for (let j = 1; j < arr.length; j++) {
    if (arr[i] + arr[j] === 7) {
      temp.push([i, j]);
    }
  }
}
console.log(temp);

//palindrome
/* let str = "madam";
console.log("Original:", str);
let str1 = str.split("").reverse().join("");
console.log("Reversed:", str1);
if (str === str1) {
  console.log("Palindrome");
} else {
  console.log("Not palindrome");
} */