Having trouble making the word uppercase in JavaScript

Question

Having trouble making the word uppercase in JavaScript

I am currently facing a challenge where I want to convert an entire word into capital letters. However, my approach seems to be encountering some issues. When it comes to individual letters, the toUpperCase method works perfectly fine.

var name = "gates";
for (var i=0; i< name.length; i++){
name[i] = name[i].toUpperCase();
}
name;

Interestingly, when I try using "hello world".toUpperCase(), everything functions as expected. But for some reason, looping through individual characters in an array doesn't yield the desired outcome! Is there a specific property of arrays/strings in JavaScript that I'm missing?

In response to RGraham's point about string immutability preventing modification, I find myself puzzled by the community's negative reaction. The validity of the question is clear to me.

javascript arrays

Answer 1

Answer №1

The issue with this code is that trying to access a string using array syntax is strictly for reading. According to the MDN documentation:

When using bracket notation to access characters, attempts to delete or modify these properties will fail. The properties in question are not editable or configurable. (Refer to Object.defineProperty() for further details.)

Therefore, console.log(name[0]) will give you the desired result, but trying to do name[0] = "G"; will not alter the content of the name variable.

Answer 2

The issue with this code is that trying to access a string using array syntax is strictly for reading. According to the MDN documentation:

When using bracket notation to access characters, attempts to delete or modify these properties will fail. The properties in question are not editable or configurable. (Refer to Object.defineProperty() for further details.)

Therefore, console.log(name[0]) will give you the desired result, but trying to do name[0] = "G"; will not alter the content of the name variable.

Answer 3

Answer №2

Instead of iterating through each letter, you can simply use the following code:

let username = "gates";
username = username.toUpperCase();

Answer 4

Instead of iterating through each letter, you can simply use the following code:

let username = "gates";
username = username.toUpperCase();

Answer 5

Answer №3

In many programming languages, a string is considered immutable which implies that you are unable to modify individual characters or append text without creating a new string.

userName = userName.toUpperCase();

Executing the above code will return the desired result by converting the original string to uppercase and storing it in the variable 'userName'.

Answer 6

In many programming languages, a string is considered immutable which implies that you are unable to modify individual characters or append text without creating a new string.

userName = userName.toUpperCase();

Executing the above code will return the desired result by converting the original string to uppercase and storing it in the variable 'userName'.

Answer 7

Answer №4

As per the information found on this website

let message = "Good afternoon!";
let result = message.toUpperCase();

Answer 8

As per the information found on this website

let message = "Good afternoon!";
let result = message.toUpperCase();

Answer 9

Answer №5

http://www.example.com/jsref/jsref_touppercase.html

let message = "Good Morning!";
let output = message.toUpperCase();

Output:

GOOD MORNING!

Answer 10

http://www.example.com/jsref/jsref_touppercase.html

let message = "Good Morning!";
let output = message.toUpperCase();

Output:

GOOD MORNING!

Having trouble making the word uppercase in JavaScript

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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