"hello" + " " + "there"     evaluates to     hello there
3 / 5     evaluates to     0.6
5 % 3     evaluates to     2
5.5 % 3.3     evaluates to     2.2
var a = 5; // sets the value of a to 5
a     evaluates to     5
++a     evaluates to     6
++a     evaluates to     7
--a     evaluates to     6
Notice that the unary increment and decrement changed the value before evaluation
Next see the postfix increment and decrement changed the value after evaluation
a++     evaluates to     6
a     evaluates to     7
a--     evaluates to     7
a     evaluates to     6
Let's look at the equal and equivalent operators
There should be no spaces between the equal signs
5 = = "5"     evaluates to     true
5 = = = "5"     evaluates to     false