JavaScript Program to Sort Words in Alphabetical Order

Example: Sort Words in Alphabetical Order

// program to sort words in alphabetical order

// take input
const string = prompt('Enter a sentence: ');

// converting to an array
const words = string.split(' ');

// sort the array elements
words.sort();

// display the sorted words
console.log('The sorted words are:');

for (const element of words) {
  console.log(element);
}

Output

Enter a sentence: I am learning JavaScript
The sorted words are:
I
JavaScript
am
learning

In the above example, the user is prompted to enter a sentence.

• The sentence is divided into array elements (individual words) using the split(' ') method. The split(' ') method splits the string at whitespaces.
   
• The elements of an array are sorted using the sort() method. The sort() method sorts the strings in alphabetical and ascending order.
• The for...of loop is used to iterate over the array elements and display them.

Here, we are sorting alphabetically. So, the expected output is am, I, JavaScript, and learning. However, am is printed after I and JavaScript.

Why I and JavaScript are printed before am?

This is because I and J of JavaScript are in uppercase. And, when we use the sort() method, uppercase letters are placed before lowercase.

We can verify this by providing only lowercase input.

// program to sort words in alphabetical order

// take input
const string = prompt('Enter a sentence: ');

// converting to an array
const words = string.split(' ');

// sort the array elements
words.sort();

// display the sorted words
console.log('The sorted words are:');

for (const element of words) {
  console.log(element);
}

Output

Enter a sentence: i am learning javascript
The sorted words are:
am
i
javascript
learning

Here, we get the expected output now.

words.join(' '); // I JavaScript am learning