implement function to convert to pounds

Author: vmoratti

Sprint-2/3-mandatory-implement/3-to-pounds.js

@@ -4,3 +4,37 @@
 // 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
+  ); //variable
+  //  "penceStringWithoutTrailingP" declared and assigned first three characters
+  //  of "penceString" using the substring method, removing the trailing "p".
+
+  const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3, "0");
+  // variable "paddedPenceNumberString" declared and assigned the value of "penceStringWithoutTrailingP"
+  // padded to a minimum length of 3 characters with leading zeros using the padStart method. Which is clever way,
+  // really to replace it with zeros if number of pence is less than 3 characters long.
+
+  const pounds = paddedPenceNumberString.substring(
+    0,
+    paddedPenceNumberString.length - 2
+  );
+  //Variable "pounds" declared and assigned value of "paddedPenceNumberString" but without the last
+  // two characters.
+
+  const pence = paddedPenceNumberString
+    .substring(paddedPenceNumberString.length - 2)
+    .padEnd(2, "0");
+  // Variable "pence" declared and assigned value of the last two characters of "paddedPenceNumberString"
+  // and padded to a minimum length of 2 characters with zeros at the end, padEnd method is used once again.
+  // it is to ensure that if the number of pence is less than 2 characters long, it will be padded with zeros
+  // at the end.
+
+  return `£${pounds}.${pence}`;
+  // Finally equivalent in "pounds" and "pence" is returned
+}
+console.log(toPounds("2345")); // testing with normal string of numbers
+console.log(toPounds("-2345")); // testing with string of negative numbers
+console.log(toPounds("0")); // testing with zero