ohh, i see, thanks!

Not sure if I can explain it clearly but I'll try:

Take a look at this sample input:
([78, 117, 110, 99, 104, 117, 107, 115], 100), false);

the key to understanding this is the 'return' keyword
using the condition 'if (i>limit)' return false, AS SOON AS a value is greater than 100, 'false' gets returned and STOPS the execution of the function

where as in 'if (i<=limit)', AS SOON AS a value is lower than 100, 'true' gets returned immediately and STOPS the function WITHOUT getting to test the remaining values in the array

This is just a list slice. Think of it like arr[(i+1):], so it takes the list from the index i+1 up to the end. More reading

what does this mean please?
arr[i+1:]