included explanation of the expression

Author: Baba05206

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

@@ -7,4 +7,22 @@ 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); // outputs a random integer between 1 and 100 (inclusive)
+
+/*
+1. Math.random()
+Returns a floating-point number between 0 (inclusive) and 1 (exclusive).
+2. (maximum - minimum + 1)
+Calculates the size of the range (the number of possible values).
+3. Math.random() * (maximum - minimum + 1)
+Scales the random number to the desired range.
+In this case: Math.random() * (100 - 1 + 1) → Math.random() * 100
+So now the result is between 0 and 99.999...
+4. + minimum
+Shifts the range up by the minimum value.
+So 0–99 becomes 1–100
+5. Math.floor(...)
+Rounds the result down to the nearest whole number.
+So now we get an integer between 0 and 99 inclusive
+*/