Explain random number generation with Math.random and Math.floor

Author: abmhts

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

@@ -4,6 +4,19 @@ const maximum = 100;
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
 
 // In this exercise, you will need to work out what num represents?
+//num represents a randomly generated whole number between 1 and 100.
+
 // Try breaking down the expression and using documentation to explain what it means
+   // Math.random() generates a random decimal number greater than or equal to 0 and less than 1. Multiplying it by 100 gives a number between 0 and 100.
+   // Math.floor() always rounds down and returns the largest integer less than or equal to a given number in this case between 0 and 99. Finally, adding 1 changes the range to 1–100.
+   // Math.floor(Math.random() * (maximum - minimum + 1)) 
+   // Math.floor(Math.random() * (100 - 1 + 1)
+   // Math.floor(Math.random() * 100)
+   // Math.random give any random number between 0 to 1 example 0.225 * 100 = 22.5
+   // Math.floor rounds that number to a whole number so 22.5 will become 22
+   // (22) + minimum
+   // 22 + 1 
+   // 23 
+   
 // 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