In the code below, what does "i" mean and is it compulsory to use it?

Question

for (i=1; i<=5; i++) {
document.write(i + "<br />");
}

Answer 1

it's use for iteration. though you can you use any letters you like but it would be easier to recall "i" for iteration. 😊

Answer 2

'i' is the iterator of the for-loop.
It has an initial value of '1'.
This value will be increased by '1' every time the loop is running trough and til the condition (i<=5) is true.

Answer 3

btw be carefull If you use nested loops and make sure that you usw different variables for each loop

Answer 4

"i" is variable name defined by FOR loop. You can use any other name for this variable.