How to capitalize the first letter of a string in JavaScript
In JavaScript, we can use the built-in String.toUpperCase method to capitalize all letters of a string. In our case, however, we want to capitalize only the first letter while keeping the rest as they are.
To achieve this, we can split the input string into two substrings, where the first substring contains only the first character, while the second contains the rest of the string. We can then use the toUpperCase method on the first substring and append the second substring to it.
Syntax
The toUpperCase method follows the below syntax. It is called by a string, and it returns the modified string. This method doesn't change the original string; instead, it creates a copy.
string.toUpperCase()
Code
The code below implements the solution discussed above:
let text = "educative";let capitalized = text.charAt(0).toUpperCase() + text.slice(1);console.log(capitalized);
In the code above, we implement the following:
Line 1: We define a variable called
textto act as our input string.Line 2: We use the
charAtmethod to retrieve the first letter of the input string and capitalize it using thetoUpperCasemethod. We use theslicemethod to retrieve the rest of the string—excluding the first letter—and append it to the capitalized first letter.Line 3: We print the result to the console.
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