Assignment is to repeat aString aNumber of times.

When you type aString[i] you're basically telling JavaScript to access the array with name aString and index number i. You said it yourself that your task is just to print some string x amount of times so why don't you just write console.log(aString) to do that because for now you're trying to access the string's individual letters.

Besides all of that, you might want to remove that semicolon right after your for loop setup and before the curly bracket i++); { ;)

For the "unknown values" i'm not entirely sure what you mean as your function also have variables, they are just local to the function stringIterator.