Function capitalize

Returns string

A new string with the first letter in uppercase.

// Basic usage
const capitalized = capitalize("hello world");
console.log(capitalized); // "Hello world"
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// With an already capitalized string
const alreadyCapitalized = capitalize("Journalism");
console.log(alreadyCapitalized); // "Journalism"
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// With a single character
const singleChar = capitalize("a");
console.log(singleChar); // "A"
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