To increment a variable in Javascript is very easy:
ko=0;
ko++;
document.write(ko);
Which Prints:
1
-We create and name our variable ko and give it a value of 0.
-We increment it, or add one, with plus plus ++
-We print to the browser with document.write
-We gave our variable ko a value of 1 to start this time.
-We created a for loop
-We said if our variable h equals 2 or 4, the double vertical bars mean or, increment ko.