Function-ify old code into function toPounds in 3-to-pounds.js

Author: habohlin

Sprint-3/3-mandatory-implement/3-to-pounds.js

@@ -4,3 +4,32 @@
 // You will need to declare a function called toPounds with an appropriately named parameter.
 
 // You should call this function a number of times to check it works for different inputs
+
+function toPounds(penceString) {
+  const penceStringWithoutTrailingP = penceString.substring(
+    0,
+    penceString.length - 1,
+  );
+
+  const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+  const pounds = paddedPenceNumberString.substring(
+    0,
+    paddedPenceNumberString.length - 2,
+  );
+
+  const pence = paddedPenceNumberString
+    .substring(paddedPenceNumberString.length - 2)
+    .padEnd(2, "0");
+
+  return [pounds, pence];
+}
+
+//tests
+let [pounds, pence] = toPounds("399p");
+console.log(`£${pounds}.${pence}`);
+[pounds, pence] = toPounds("3995p");
+console.log(`£${pounds}.${pence}`);
+[pounds, pence] = toPounds("42895p");
+console.log(`£${pounds}.${pence}`);
+[pounds, pence] = toPounds("2p");
+console.log(`£${pounds}.${pence}`);