JS Built-ins
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StringString.prototype.slicebeginner

String.prototype.slice() — slice single char

📖 Usage Example
const str = 'Hello, World!'
str.slice(7, 12)    // → 'World'
str.slice(-6, -1)   // → 'World'
str.slice(7)        // → 'World!'

Use slice() to extract a portion of a string by start and end indices, supporting negative indices.

String.prototype.slice() — Single Character

Use .slice(n, n+1) to extract exactly one character at index n.

Challenge: Implement charAt(str, n) that returns the character at index n using slice.

charAt('hello', 1) // → 'e'
charAt('world', 4) // → 'd'
💡 Hints (1)
  • • `str.slice(n, n + 1)` extracts exactly one character at index `n`.