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

Author: pathywang

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

@@ -4,6 +4,13 @@ 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?
-// Try breaking down the expression and using documentation to explain what it means
+// Try breaking down the expression and using documentation to explain what it mean
 // 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
+num reprents the number is  randomly generated whole number betweeb 1 and 100,inclusive
+Math.random() returns a random decimal between 0(inclusive) and 1(exclusive). while maximum-minimum +1=100, Math.random()*(maximum-matchMedia+1)
+range is between 0 and 99.99999
+Due to that Math.floor(...) rounds down the decimal to the nearest whole number.From this Stage, we have interger between o and 99.
+After + minimum, the range is between 1 and 100.
+This is classcial expressions for generating a random interger between two values- between 1 and 100, inclusive in this function.
+This kind of expression is commonly used for things like: rolling dice,random quiz questions, game mechanics.