This JavaScript code initializes a string `str` with the value 'hello'. It then converts the string to uppercase using the `toUpperCase` method and prints the result 'HELLO' to the console.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
What does this JavaScript code do?

### Input:
`javascript
let str = 'hello';
str = str.toUpperCase();
console.log(str);
`

### Response:
This JavaScript code initializes a string `str` with the value 'hello'. It then converts the string to uppercase using the `toUpperCase` method and prints the result 'HELLO' to the console.<|im_end|>