Revert Sprint-1 folder to CYF's original version

Author: HoussamLh

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

@@ -2,6 +2,5 @@ let count = 0;
 
 count = count + 1;
 
-//
 // Line 1 is a variable declaration, creating the count variable with an initial value of 0
-// Line 3 Take the current value of count, and then add 1, and store the result back in count.
+// Describe what line 3 is doing, in particular focus on what = is doing

Sprint-1/1-key-exercises/2-initials.js

@@ -5,11 +5,7 @@ let lastName = "Johnson";
 // Declare a variable called initials that stores the first character of each string.
 // This should produce the string "CKJ", but you must not write the characters C, K, or J in the code of your solution.
 
-
-let initials = firstName.charAt(0) + middleName.charAt(0) + lastName.charAt(0);
-
-console.log(initials);
-
+let initials = ``;
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
 

Sprint-1/1-key-exercises/3-paths.js

@@ -17,8 +17,7 @@ console.log(`The base part of ${filePath} is ${base}`);
 // Create a variable to store the dir part of the filePath variable
 // Create a variable to store the ext part of the variable
 
-const dir = filePath.slice(0, lastSlashIndex);
-const ext = base.slice(base.lastIndexOf(".") + 1);
-
+const dir = ;
+const ext = ;
 
 // https://www.google.com/search?q=slice+mdn

Sprint-1/1-key-exercises/4-random.js

@@ -3,74 +3,7 @@ const maximum = 100;
 
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
 
-// 1- In this exercise, you will need to work out what num represents?
-
-// the num gives a random whole number between 1 and 100 like 73, 12, or 100.
-
-// 2- Try breaking down the expression and using documentation to explain what it means
-/*
-
-1. Math.random()
-
-Returns a random decimal number between 0 and 1 but never gives 1.0.
-
-Example: 0.24 
-
-2. (maximum - minimum + 1)
-
-This gives number of possible values.
-
-Without the +1, we'd only get the difference, not the full count.
-
-for example:
-
-5 - 1 = 4 → but there are actually 5 numbers: 1, 2, 3, 4, 5
-
-So we add +1 to include both ends of the range.
-
-3. Math.random() * (maximum - minimum + 1)
-
-This gives a random decimal number between 0 and 100 (like 24, 65 ...)
-
-Because we want the random decimal scaled to the size of the range of possible values.
-
-For example, if we want a number between 1 and 100 (inclusive), there are 100 possible numbers (1, 2, ..., 100).
-
-Multiplying by 100 means the decimal is scaled up to cover all those possibilities before rounding.
-
-4. Math.floor(...)
-
-This rounds the decimal down to the nearest whole number.
-
-Example: Math.floor(78.43) → 78
-
-5. + minimum
-
-we add the minimum to shift the range correctly, and make sure the random number up to start from minimum.
-
-5-1- for example if we remove the + minimum 
-
-5-1-1 Math.random() 0.9999 * 99 + 1 → only goes up to 99.999... → max = 99.999... → floor = 100 (but very unlikely) 
-
-now 100 becomes very hard to reach, and in many cases, you never get it.
-
-5-1-2 Math.random() 0.00 * 99 + 1 → only goes up to 0... → max = 0... → floor = 0 (now the minimum is 0, and can appears) 
-
-conclusion : when we don’t add + minimum, there is a chance that 1 appears, but it’s not the guaranteed minimum anymore — 
-
-and the range starts at 0, not 1.
-
-5-2- when we add +minimum 
-
-now we make sure the min and max can appear in the final results and make sure the minimum is 1 not 0. 
-
-Minimum appears when random = 0
-
-Maximum appears when random is almost 1 (like 0.9999...).
-
-example : Math.random() * 99 + 1 → up to 0.99 → max = 99 → floor = 99 → +1 = 100 (so more possibilities for 100 to appears) 
-
-*/
-
-//It will help to think about the order in which expressions are evaluated
-//Try logging the value of num and running the program several times to build an idea of what the program is doing
+// In this exercise, you will need to work out what num represents?
+// Try breaking down the expression and using documentation to explain what it means
+// It will help to think about the order in which expressions are evaluated
+// Try logging the value of num and running the program several times to build an idea of what the program is doing

Sprint-1/2-mandatory-errors/0.js

@@ -1,12 +1,2 @@
- // we can turn the lines into comments. we can use:
-
-// for single-line comments, or
-
-/* for multi-line comments. */
-
-/*
-
 This is just an instruction for the first activity - but it is just for human consumption
-We don't want the computer to run these 2 lines - how can we solve this problem?  
-
-*/
+We don't want the computer to run these 2 lines - how can we solve this problem?

Sprint-1/2-mandatory-errors/1.js

@@ -1,5 +1,4 @@
 // trying to create an age variable and then reassign the value by 1
-// Changed age declaration from const to let to allow reassignment
 
-let age = 33;
+const age = 33;
 age = age + 1;

Sprint-1/2-mandatory-errors/2.js

@@ -1,5 +1,5 @@
 // Currently trying to print the string "I was born in Bolton" but it isn't working...
-// what's the error ?   The error here is due to using a variable before it's declared.
+// what's the error ?
 
 console.log(`I was born in ${cityOfBirth}`);
 const cityOfBirth = "Bolton";

Sprint-1/2-mandatory-errors/3.js

@@ -1,34 +1,9 @@
-// We want last4Digits to store the last 4 digits of cardNumber
-
-/* 
-    Prediction before running:
- This will cause an error because cardNumber is a number,
- and numbers don't have the slice() method. slice() works only on strings or arrays.
- 
-*/
-
-/*   
-    Running the code would give:
-  TypeError: cardNumber.slice is not a function. 
-  
-*/
-
-/* 
-     Why?
-    Because slice() is not defined for numbers in JavaScript.
-    
-*/
-
-/* 
-    Fix:
- Convert cardNumber to a string first, so we can use slice() on it.
- Then slice the last 4 characters to get the last 4 digits.
- 
-*/
-
 const cardNumber = 4533787178994213;
-
-const last4Digits = String(cardNumber).slice(-4);
-
-console.log(last4Digits); // Output: 4213
-
+const last4Digits = cardNumber.slice(-4);
+
+// The last4Digits variable should store the last 4 digits of cardNumber
+// However, the code isn't working
+// Before running the code, make and explain a prediction about why the code won't work
+// Then run the code and see what error it gives.
+// Consider: Why does it give this error? Is this what I predicted? If not, what's different?
+// Then try updating the expression last4Digits is assigned to, in order to get the correct value