completed 4-random.js and tested it with logging to the console

Author: d-odumosu

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

@@ -2,8 +2,26 @@ const minimum = 1;
 const maximum = 100;
 
 const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
+console.log(num)
+
+
+ //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
+
+/*
+Answer
+
+num is a variable that'll hold the output of the expression in line 4, I have run the code several times and I get a
+different number each run.
+Math.random returns a random decimal number between 0 (inclusive) and 1 (exclusive).
+Math.floor rounds the number to the nearest integer.
+This expression is evaluated according to parenthesis and operator precedence, so for this expression it will be as follows:
+1. (maximum - minimum + 1)
+2. Math.random() is called
+3. result from Math.random * result from > maximum - minimum + 1
+4. Math.floor is then called with (Math.random * result from > maximum - minimum + 1)
+5. result from Math.floor + minimum
+*/
 
-// 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