# Mexican Wave

Task:  
Create a function that turns a string into a Mexican Wave. You will be passed a string and you must return that string in an array where an uppercase letter is a person standing up.

```javascript
let mexicanWave = str.slice(0, i) + str[i].toUpperCase() + str.slice(i + 1);
```

Above code aims to create a string where one character is capitalized (turned into uppercase), and the rest of the string is unchanged.

Let's break it down:

1. `str.slice(0, i)`: This is creating a new string that includes the characters from the start of the original string (`str`) up to but not including the `i`th character. `slice` is a method provided by JavaScript's String prototype that returns a portion of the string.  
    
2. `str[i].toUpperCase()`: This is getting the `i`th character from the original string (`str[i]`) and capitalizing it using the `toUpperCase` method, also provided by the String prototype.  
    
3. `str.slice(i + 1)`: This is creating a new string that includes all characters from the original string (`str`) starting from the character after the `i`th character.  
    
4. The `+` operators are then concatenating these three strings together to form a new string. The `i`th character of this new string is capitalized, and the rest of the string is the same as the original string.