JS Practice — Built-in Objects

String.prototype.toUpperCase() — mixed case to uppercase

📖 Usage Example

'hello world'.toUpperCase()   // → 'HELLO WORLD'
'abc'.toUpperCase()           // → 'ABC'
'xyz123'.toUpperCase()        // → 'XYZ123'

Use toUpperCase() to convert all alphabetical characters in a string to uppercase.

String.prototype.toUpperCase() — Mixed Case

All lowercase letters in a mixed string are converted to uppercase.

Challenge: Implement shout(str) that converts any string to uppercase.

shout('HeLLo WoRLd') // → 'HELLO WORLD'

💡 Hints (1)