How to check if the first character of a string is a specific character in javascript?

Hi Friends 👋,

Welcome To Infinitbility! ❤️

Today, I’m going to show How do I check if the first character of a string is a specific character in Javascript, here I will use the javascript string charAt() method to check if the first character of a string is a specific character or not.

What is a charAt() method?

The String object’s charAt() method returns a new string consisting of the single UTF-16 code unit located at the specified offset into the string.

Let’s start the today’s tutorial How do you check if the first character of a string is a specific character in JavaScript?

Let’s understand how we can do it

1. Take sample string variable
2. Use the charAt() method with index 0 to get first character
3. Use compare operator between the first character and specific character and console whether it’s a match or not

// Take sample string variable
const str = 'Hello world';

// Use the `charAt()` method with index 0 to get first character
let firstChar = str.charAt(0);
console.log("firstChar", firstChar);

// Use compare operator between the first character and specific character and console whether it's a match or not

// valid case example
if (firstChar == 'H') {
    console.log("First character is our specific character");
} else {
    console.log("First character isn't our specific character");
}

// invalid case example
if (firstChar == 'E') {
    console.log("First character is our specific character");
} else {
    console.log("First character isn't our specific character");
}

The above program is the simplest way to check string first character of a string is a specific character or not. let’s check the output.

I hope it’s help you, All the best 👍.