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

Infinitbility
JavaScript
May 30th, 2022 · 1 min read

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
1// Take sample string variable
2const str = 'Hello world';
3
4// Use the `charAt()` method with index 0 to get first character
5let firstChar = str.charAt(0);
6console.log("firstChar", firstChar);
7
8// Use compare operator between the first character and specific character and console whether it's a match or not
9
10// valid case example
11if (firstChar == 'H') {
12 console.log("First character is our specific character");
13} else {
14 console.log("First character isn't our specific character");
15}
16
17// invalid case example
18if (firstChar == 'E') {
19 console.log("First character is our specific character");
20} else {
21 console.log("First character isn't our specific character");
22}

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.

javascript, check if a string contains a specific character example
javascript, check if the first character of a string is a certain character example

I hope it’s help you, All the best 👍.

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