Address mentor feedback: clarify increment operation and explain padEnd is unnecessary

Author: Richiealx

Sprint-1/1-key-exercises/1-count.js

@@ -1,11 +1,10 @@
+// This script shows how a counter changes step by step.
+
 let count = 0;
 
+// Line 3 increments the current value of count by 1.
+// It takes the current value of count (0), adds 1 to it,
+// and assigns the result (1) back to the count variable.
 count = count + 1;
 
 console.log(count);
-
-// Line 1 is a variable declaration, creating the count variable with an initial value of 0
-// Describe what line 3 is doing, in particular focus on what = is doing
-
-// Line 3 takes the current value of count (0), adds 1 to it,
-// and assigns the result (1) back to the count variable using =.

Sprint-1/3-mandatory-interpret/answers.md

@@ -139,10 +139,11 @@ Also, minutes and seconds are not padded with leading zeros, so values like 2:3:
 - For `"399"`, length is 3, so substring(0, 1) → `"3"`.
 
 5) `const pence = paddedPenceNumberString.substring(paddedPenceNumberString.length - 2).padEnd(2, "0");`
-- First, `substring(length - 2)` takes the last 2 digits.
-- Then `padEnd(2, "0")` ensures it’s at least 2 characters (adds zeros on the right if needed).
-- Purpose: get exactly two pence digits.
-- For `"399"`, last two digits are `"99"` → stays `"99"`.
+- First, `substring(paddedPenceNumberString.length - 2)` takes the last 2 characters.
+- Because `paddedPenceNumberString` has already been padded earlier with `padStart(3, "0")`, it will always be at least 3 characters long.
+- That means the substring operation already returns exactly 2 characters for any valid `penceString`.
+- So `.padEnd(2, "0")` is not actually needed in this script.
+- For `"399"`, the last two digits are `"99"`, so the result stays `"99"`.
 
 6) `console.log(\`£${pounds}.${pence}\`);`
 - Uses a template literal to format the final currency string as pounds and pence.