JS Practice — Built-in Objects

String() — convert null and undefined

📖 Usage Example

String(42)         // → '42'
String(true)       // → 'true'
String(null)       // → 'null'
String(undefined)  // → 'undefined'

Use String() to safely convert any value to its string representation.

String Constructor — null & undefined

Unlike template literals via concatenation, String(null) → 'null' and String(undefined) → 'undefined'.

Challenge: Implement toStr(val) that uses String(val) and returns the result.

toStr(null)      // → 'null'
toStr(undefined) // → 'undefined'

💡 Hints (1)