JAVASCRIPT

uppercase string in js

var str = "Hello World!";
var res = str.toUpperCase();  //HELLO WORLD!

touppercase javascript array

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

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

console.log(uppercased);

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

How to Use the toUpperCase() String Method in javascript

const string = "HeLLo woRld"

const uppercased = string.toUpperCase()

console.log(string)
// HeLLo woRld

console.log(uppercased)
// HELLO WORLD

js to uppercase

const string = "A string";

const upperCase = string.toUpperCase();
console.log(upperCase); // -> A STRING

const lowerCase = string.toLowerCase();
console.log(lowerCase); // -> a string

string uppercase

let txt = "Hello World!";
txt = txt.toUpperCase();

JS .toUpperCase

.toUpperCase()

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

string toUpper

string a = "String";
string b = a.Replace("i", "o"); // Strong
       b = a.Insert(0, "My ");  // My String
       b = a.Remove(0, 3);      // ing
       b = a.Substring(0, 3);   // Str
       b = a.ToUpper();         // STRING
int    i = a.Length;            // 6

The toUpperCase JavaScript string method

//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