implement topounds.js

Author: mandipsanger

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

@@ -1,6 +1,30 @@
-// In Sprint-1, there is a program written in 3-mandatory-interpret/3-to-pounds.js
+// In Sprint-1, there is a program written in interpret/to-pounds.js
 
 // You will need to take this code and turn it into a reusable block of code.
 // 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,
+  );
+
+  return `£${pounds}.${pence}`;
+}
+
+console.log(toPounds("99p")); // £0.99
+console.log(toPounds("5p")); // £0.05
+console.log(toPounds("123p")); // £1.23