London | 26-ITP-JAN | Shuheda Begum | Sprint 1 | Sprint-1

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

@@ -4,3 +4,4 @@ count = count + 1;
 
 // 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
+// This line (line 3), is updating the value of the count variable. The = operator is an assignment operator which assigns the value on the right (count + 1) to the variable on the left (count). 

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

@@ -4,8 +4,7 @@ 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 = ``;
+let initials = firstName[0] + middleName[0] + lastName[0];
 
 // https://www.google.com/search?q=get+first+character+of+string+mdn
 

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

@@ -17,7 +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 = ;
-const ext = ;
+const dir = filePath.slice(0, lastSlashIndex);
+const ext = base.slice(base.lastIndexOf("."));
 
 // https://www.google.com/search?q=slice+mdn

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

@@ -7,3 +7,16 @@ const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
 // 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
+
+// Math.random returns a random number between 0 (inclusive) and 1 (exclusive).
+// const minimum = 1; const maximum = 100; +1 so, 100 - 1 + 1 = 100
+// Math.random() * 100 means the decimal number will be multiplied by 100, so the range of possible values is from 0 to 99.9999...
+// Math.floor rounds the number down to the nearest whole number, so the possible values are from 0 to 99.
+// Eg. 12.9 becomes 12, 0.3 becomes 0, 99.9 becomes 99.
+// Brackets(), Multiply*, Function(Math.floor), Addition+
+// 1) Pick a random number between 0 and 1, eg. 0.5
+// 2) Multiply that number by 100, eg. 0.5 * 100 = 50
+// 3) Round that number down to the nearest whole number, eg. Math.floor(50) = 50
+// 4) Add 1 to that number, eg. 50 + 1 = 51
+
+// num represents a random whole number between 1 and 100.

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

@@ -1,2 +1,3 @@
-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?
+// 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?
+// The forward slash is used to indicate a comment in JavaScript, so the computer will ignore these lines when running the program.

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

@@ -1,4 +1,8 @@
 // trying to create an age variable and then reassign the value by 1
 
-const age = 33;
+let age = 33;
 age = age + 1;
+console.log(age);
+
+// The code above will output 34, because we are reassigning the value of age to be the current value of age plus 1. So, 33 + 1 = 34.
+