JS Practice — Built-in Objects

String.prototype.charCodeAt() — code of second character

📖 Usage Example

const str = 'ABC'
str.charCodeAt(0)   // → 65
str.charCodeAt(1)   // → 66
str.charCodeAt(99)  // → NaN

Use charCodeAt() to get the UTF-16 code unit value of the character at the given index.

String.prototype.charCodeAt() — Second Character

Challenge: Implement secondCharCode(str) that returns the char code of the character at index 1.

secondCharCode('hello') // → 101  ('e')
secondCharCode('AB')    // → 66   ('B')

💡 Hints (1)