Enhanced For Loop
Definition
An enhanced for loop (also known as a foreach loop) is a simplified way to iterate over elements in an array or collection. It automatically handles indexing and provides an easy way to access each element without explicitly using indices.
Analogy
Imagine you have a bag full of different colored candies. Using an enhanced for loop would be like taking out one candy at a time from the bag without needing to count how many candies are left or keeping track of which candy you're currently holding.
Related terms
Array: An array is a data structure that stores multiple values of the same type in contiguous memory locations. Elements in an array can be accessed using their index position.
Iterator: An iterator is an object that allows traversal through elements in a collection one by one. It provides methods like hasNext() and next() to check if there are more elements and retrieve them respectively.
Index: An index is a numerical value that represents the position of an element in an ordered list or data structure. It starts from 0 for the first element and increments by 1 for each subsequent element.
"Enhanced For Loop" appears in:
Study guides (3)
Practice Questions (14)
Which of the following can be traversed using the enhanced for loop in Java?
Which of the following is the correct header for the enhanced for loop?
Which of the following is true about rewriting an enhanced for loop as another type of loop?
What happens when we attempt to modify the elements of an array using the enhanced for loop?
What can we do in the body of an enhanced for loop traversing an array of objects to change the objects' instance variables?
How can we rewrite the following for loop as an enhanced for loop? int[] array = {5, 4, 10, 23, 15} for (int i = 0; i < array.length; i++) { System.out.println(array[i]); }
How can we rewrite the following for loop as an enhanced for loop? int[] array = {30, 2, 5, 6} for (int i = array.length-1; i >= 0; i--) { System.out.println(array[i]); }
Which of the following enhanced for loops correctly traverses the following array? String[] arr = {'Hello', 'my', 'name', 'is'};
In the enhanced for loop, what is the role of 'type' in the general enhanced for loop header 'for (type element: arrayName)'?
Can we rewrite the following for loop as an enhanced for loop? boolean[] array = {true, false, false, true, false, true} for (int i = 0; i < array.length; i+=6) { System.out.println(array[i]); }
What exception is thrown if the size of the ArrayList changes while traversing it using an enhanced for loop?
How would you traverse through ‘list’, an ArrayList of Integer objects, using an enhanced for loop?
In which of the following situations is it not appropriate to use an enhanced for loop instead of a regular for loop?
What types of traversal can be performed using the enhanced for loop?
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