JS Practice — Built-in Objects

String.prototype.length — basic length

📖 Usage Example

'hello'.length    // → 5
''.length         // → 0
'😀'.length       // → 2

The length property returns the number of UTF-16 code units in the string.

String.prototype.length

str.length is a read-only property that returns the number of UTF-16 code units in the string.

Challenge: Implement strLen(str) that returns the length of the string.

strLen('hello') // → 5
strLen('hi')    // → 2

💡 Hints (1)