Answering question in 4-random.js

Author: habohlin

Sprint-2/1-key-exercises/4-random.js

@@ -7,3 +7,20 @@ 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
+
+console.log(num);
+
+// Answer: num is a random number between 1 and 100, including 1 and 100. So if I change the values of minimum
+// and maximum it will be a random value between them, including them.
+ 
+// Math.random generates a random value between 0 and 1, including 0 but not 1.
+
+// (maximum - minimum + 1) gives the amounts of values we want to be able to generate.
+// If minimum was 60 and maximum was 70, inclusive, that would make 11 possible values
+
+// Math.random * (maximum - minimum + 1) would generate any value between 0 and 11, including 0 but not 11
+
+// Math.floor rounds the value down, leaving us with any value between 0 and 10 inclusive
+
+// + minimum at the end, 60 in our thought experiment, makes the values range between 60 and 70 inclusive
+// which is what we wanted.