Adding 3 JS challenges

JS_Basic_Challenges/3rd-Challenge.js

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+/*
+
+Level: Beginner
+
+CODING CHALLENGE 3
+
+
+
+
+John and his family went on a holiday and went to 3 different restaurants. 
+The bills were: $124, $48 and $268.
+
+To tip the waiter a fair amount, John created a simple tip calculator 
+(as a function). 
+
+He likes to tip: 
+20% of the bill when the bill is less than $50, 
+15% when the bill is between $50 and $200, 
+and 10% if the bill is more than $200.
+
+In the end, John would like to have 2 arrays:
+1) Containing all three tips (one for each bill)
+2) Containing all three final paid amounts (bill + tip).
+
+(NOTE: To calculate 20% of a value, simply multiply it with 20/100 = 0.2)
+
+
+
+SOLUTION 👇🏼 
+
+*/
+
+
+
+
+
+
+
+
+
+
+// With comments: 
+
+
+// Store the initial values that were given.
+
+var bills = [124, 48, 268];   // in dollars $
+var tips = [20, 15, 10];      // in percentage %
+
+
+
+// Declare a function to calculate the tip.
+// Pass 'billAmount' as a parameter.
+// Store the final tip amount in 'finalTip'.
+// Return 'finalTip'.
+
+function tipCalculator(billAmount) {
+  var finalTip = (billAmount * 20) / 100;  // (bill total amount * 20% extra tip) / 100 
+  return finalTip;
+}
+
+
+
+// Add a conditional is/ else if statement to calculate 
+// tips for all three scenarios (20%, 25%, 10%). 
+
+function tipCalculator(billAmount) {
+  var finalTip;
+
+  if (billAmount < 50) {
+    finalTip = (billAmount * 20) / 100;
+  } else if (billAmount >= 50 && billAmount < 200) {
+    finalTip = (billAmount * 15) / 100;
+  } else {
+    finalTip = (billAmount * 10) / 100;
+  }
+  return finalTip;
+}
+
+
+
+// Update the 'tips' variable by calling the 'tipCaculator' function.
+
+// Add the 'bills' array values inside the 'tipCaculator' function
+// by referring to their index number.  
+
+
+var bills = [124, 48, 268];
+var tips = [
+  tipCalculator(bills[0]),
+  tipCalculator(bills[1]),
+  tipCalculator(bills[2])
+];
+
+
+
+// Store the final amount value inside a new variable.
+
+// We now have the final paid amounts (bill + tip), 
+// referenced by their index number, for all three scenarios (20%, 25%, 10%).
+
+
+var finalAmount = [bills[0] + tips[0], 
+                   bills[1] + tips[1], 
+                   bills[2] + tips[2]];
+
+
+
+
+/* ------------------------------------ */
+
+// Without comments: 
+
+
+function tipCalculator(billAmount) {
+  var finalTip;
+
+  if (billAmount < 50) {
+    finalTip = (billAmount * 20) / 100;
+  } else if (billAmount >= 50 && billAmount < 200) {
+    finalTip = (billAmount * 15) / 100;
+  } else {
+    finalTip = (billAmount * 10) / 100;
+  }
+  return finalTip;
+}
+
+
+var bills = [124, 48, 268];
+var tips = [
+  tipCalculator(bills[0]),
+  tipCalculator(bills[1]),
+  tipCalculator(bills[2])
+];
+
+var finalAmount = [bills[0] + tips[0], 
+                   bills[1] + tips[1], 
+                   bills[2] + tips[2]];
+
+