Implemented Uppercase function and replace method to convert strings

Author: simanongawuza

Sprint-3/3-mandatory-implement/2-cases.js

@@ -14,3 +14,9 @@
 // You will need to come up with an appropriate name for the function
 // Use the MDN string documentation to help you find a solution
 // This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
+
+function toUpperSnakeCase(str) {
+    return str.replaceAll(" ", "_").toUpperCase();
+}
+console.log(toUpperSnakeCase("hello world"))
+console.log(toUpperSnakeCase("lord of the rings"))