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only14([1, 4, 1, 4])  -> true
only14([1, 4, 2, 4])  -> false
only14([1, 1])  ->true

Below is the typical regular for-loop setup as well as the enhanced for-loop setup. How do you get the size of an ArrayList? How is it different from arrays and Strings?

for(int i = 0; i < nums.size(); i++){

   //loop generates all the valid indexes starting at 0

}

//Sometimes if you're mostly concerned about reading values

//an enhanced for-loop can be a more elegant solution

for(int el : nums){

   //this loop automatically visits every element

   //starting at position 0. each iteration, el is set to

   //the element at the current position. for example,

   //in iteration 0, el will be the element at pos 0.

}

The following are methods of a list that can be used to manipulate the contained data.