Printing A to Z in JavaScript

One of the common problems that come up in JavaScript interviews is how to print the alphabet from A to Z using JavaScript. In this article, we will discuss how to achieve this in JavaScript.

First, let’s look at a simple solution using a for loop:

    
        for(let i = 65; i <= 90; i++) {
            console.log(String.fromCharCode(i));
        }
    
    

This code uses the String.fromCharCode() method to convert the Unicode values of the alphabets A to Z into their respective characters and then prints them to the console.

Another way to achieve this is by using ES6 features like the Array.from() method and the String.fromCharCode() method:

    
        const alphabets = Array.from({length: 26}, (_, i) => String.fromCharCode(65 + i));
        console.log(alphabets);
    
    

This code creates an array of length 26 using the Array.from() method and then uses the arrow function to map each index to its corresponding alphabet using the String.fromCharCode() method.

Additionally, we can also achieve this using recursive functions:

    
        function printAlphabets(start, end) {
            if(start > end) {
                return;
            }
            console.log(String.fromCharCode(start));
            printAlphabets(start + 1, end);
        }
        printAlphabets(65, 90);
    
    

This recursive function takes a starting and ending Unicode value and prints the alphabets from A to Z using the String.fromCharCode() method. It then calls itself with the next Unicode value until the end value is reached.

In conclusion, there are multiple ways to print A to Z in JavaScript, and each of them has its pros and cons. The choice of method depends on the specific requirements of the project and the developer’s preference.