How to Generate a Random Letter Using JavaScript

In this article, we will learn about how to generate a random letter from the alphabets using vanilla and simple JavaScript. Here, the code will consist of two things, q string that contains each letter of the alphabet you can randomly select from and an expression that randomly selects one of the characters from the string of alphabet letters.

Generating a Random Alphabet in JS

const  tutons = "abcdefghijklmnopqrstuvwxyz";

const randomCharacter = tutons[Math.floor(Math.random()*tutons.length)]

In the above code snippet, the tutons variable holds a string containing all the letters of word, tutons and the tutons[Math.floor(Math.random() *tutons.length)] expression selects a random character from the tutons string variable i.e. from all the alphabets.

If you use want to review the result you can console the result in your browser using the below code line.

console.log(randomCharacter);

Complete Function to get the random letter using JavaScript (Lowercase)

function generateRandomLetter() {
  const  tutons = "abcdefghijklmnopqrstuvwxyz"
  return randomCharacter = tutons[Math.floor(Math.random() *tutons.length)]
}
console.log(generateRandomLetter()) // "t"

So if you run the generateRandomLetter() function, a random letter will be returned each time.

Complete Function to get the random letter using JavaScript (Lowercase & Uppercase)

We can also modify this function to include both uppercase and lowercase of letters:

function generateRandomLetter() {
  const  tutons = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
  return randomCharacter = tutons[Math.floor(Math.random() *tutons.length)]
}
console.log(generateRandomLetter()) // "O"

Also, we can use this function for other alphabets in any of your preferred language or input string.