JS Practice — Built-in Objects

String.prototype.at() — positive index

📖 Usage Example

const str = 'Hello'
str.at(0)    // → 'H'
str.at(-1)   // → 'o'
str.at(1)    // → 'e'

Use at() to access a character by index, supporting negative indices to count from the end.

String.prototype.at()

String.prototype.at(index) returns the character at the given index. For non-negative indices it behaves like bracket notation, but it also accepts negative indices.

Challenge: Implement getChar(str, i) that returns the character at index i using .at().

getChar('hello', 0) // → 'h'
getChar('hello', 1) // → 'e'

💡 Hints (1)

• `str.at(0)` is equivalent to `str[0]` for non-negative indices.