add 3-mandatory-implement task 2

Author: tomdu3

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

@@ -14,3 +14,13 @@
 // 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(inputString) {
+  // return the input string in UPPER_SNAKE_CASE
+  const upperSnakeCase = inputString.toUpperCase().replace(/ /g, "_");
+
+  return upperSnakeCase;
+}
+
+console.log(toUpperSnakeCase("hello there")); // Output: "HELLO_THERE"
+console.log(toUpperSnakeCase("lord of the rings")); // Output: "LORD_OF_THE_RINGS"