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JavaScript

Posted by Sameer Dewan
Sameer Dewan
Courses Plus Student 13,145 Points

Why does the console repeat loop: 5 over and over again at 2:51 in the video https://teamtreehouse.com/library/let-and-c

Hey guys,

I need some clarification help plz.

I can't understand why when we set i = 3 in the doLoop function and then have the for loop run, the output is an infinite series of loop = 5 ' s.

This is at 2: 51 , in the video at :

https://teamtreehouse.com/library/let-and-const

Thanks in advance,

Sam

1 Answer

andren
andren
28,558 Points
andren
andren
28,558 Points

The loop ends up running indefinitively due to the ending condition never being reached. The condition for running the loop is that i is less than 10.

The for loop is setup to automatically increment i once each run so normally it will only run 10 times, but if you actually set i to 3 within the loop then then though it is increment by one each run it will always be less than 10 since it is reset to 3 in each run.

Basically i normally starts at 0 and increments by one until it reaches 9, with the code change it starts at 0, then gets set to 3, and then continues to be set to 3 each time the loop runs, never reaching 9.

The reason why 5 is the number printed out is that i is set to 3, then it is increment by the loop automatically, then when it is passed to the doLoop function it has 1 added to it.

Edit: Some minor corrections.