JS Practice — Built-in Objects

String.prototype.charCodeAt() — code for A

📖 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()

str.charCodeAt(index) returns the UTF-16 code unit value of the character at the given index, or NaN for out-of-bounds.

Challenge: Implement getCode(str, i) that returns the char code at index i.

getCode('A', 0) // → 65
getCode('a', 0) // → 97

💡 Hints (1)