DSA-JAVASCRIPT

 A palindrome number is a number that remains the same when its digits are reversed. For example: 121 → Reversed → 121 1331 → Reversed → 1331 Both are palindrome numbers. In this example, we will write a JavaScript program to check whether a number is a palindrome or not without using built-in reverse methods.       function   checkPalindromeNumber ( num ) {        let   originalNumber   =   num ;        let   reversedNumber   =   0 ;        while  ( num   >   0 ) {          let   digit   =   num   %   10 ;          reversedNumber   =   reversedNumber   *   10   +   digit ;          num   =   Math . floor ( num ...

When working with arrays in JavaScript, one common interview question is finding the largest and second largest numbers without using built-in sorting methods. In this blog, we’ll understand the logic step by step with an easy example.    let   array   =  [ 10 ]      function   findSecondLargestNumber ( arr )     {        if ( arr . length   <   2 )       {          return   null ;       }        let   largest   =   - Infinity ;        let   secondLargest   =   - Infinity ;        for ( i = 0 ; i < arr . length ; i ++ )       {          if  ( largest   <   a...