JS Practice — Built-in Objects

String.prototype.repeat() — long repetition

📖 Usage Example

'ab'.repeat(3)    // → 'ababab'
'-'.repeat(5)     // → '-----'
'x'.repeat(0)    // → ''

Use repeat() to create a new string with the original repeated a specified number of times.

String.prototype.repeat() — Large Count

You can repeat a string many times. The result length is str.length * count.

Challenge: Implement buildLine(char, n) that builds a line of n identical characters.

buildLine('=', 10) // → '=========='
buildLine('ab', 4) // → 'abababab'

💡 Hints (1)