//toUpperCase is a string method that returns the uppercased version of a specified string.

// We will use this to capitalize the first letter:

​

const firstLetter = "f"

​

const firstLetterCap = firstLetter.toUpperCase()

// F

const names = ['Ali', 'Atta', 'Alex', 'John'];

​

const uppercased = names.map(name => name.toUpperCase());

​

console.log(uppercased);

​

// ['ALI', 'ATTA', 'ALEX', 'JOHN']

​

const string = "HeLLo woRld"

​

const uppercased = string.toUpperCase()

​

console.log(string)

// HeLLo woRld

​

console.log(uppercased)

// HELLO WORLD

.toUpperCase()

​

// Like this:

alert("In upper case: " + "my string".toUpperCase()); // In upper case: MY STRING