Infinite loop due to missing let statement and call by reference

[JustinG]

@Christian_Feininger

I understood from the documentation that let is not available and var should be used instead.

You can use let and const inside the function. The prohibition on let and const only applies to the main context of the rule and relates to how the rules are cached and run. The function has its own context that is separate from the main context and is treated as normal so let and const work inside the function.

@Christian_Feininger

What am I doing wrong here? In a normal Javascript environment I declare j in the function with let and it works as expected.

For this very reason, it’s good practice to declare the iteration variable in the for initialization. This is the standard way to avoid this issue:

for (var i = 0; i < 10; i++)

and

for (var i = 0; i < amountHours; i++)

See more here:

for - JavaScript | MDN

You can, of course, also work around these issues by using more complete variable naming in the loops. Instead of repeating i as the loop variable use something iLoop for the main for structure and iAver for the for structure in the function.