JavaScript Code

Problem Statement

given an array of strings, write a JavaScript program to find the longest string in array

Solution

to find the longest string in the given array of strings using JavaScript,

• initialize the longest with the first string in array
• iterate over items of the array using a for loop
  • if the current element is largest in length than that of the longest, update longest with the current element

we use

• String.length to get the length of a string
• less than comparison operator to check if the length of longest is less than the length of the current element in array

Program

1. given array of strings is strArray. find the longest string

function findLongestString(arr) {
  let longest = "";
      if (arr.length == 0) {
          return null;
      } else {
          longest = arr[0];
          for (let i = 1; i < arr.length; i++) {
              if ( longest.length < arr[i].length ) {
                  longest = arr[i];
              }
          }
          return longest;
      }
}

strArray = ["apple", "banana", "pineapple", "bean"];
longest = findLongestString(strArray);
console.log(longest);