Conventional For Loop vs Enhanced For Loop

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because herein following line,

for(int i : arr) System.out.println(arr[i]);

you are printing arr[i] rather than i itself here arr[i] tries to access element at 1,2,3,4 and 1 which is as below according to your input

arr[0]-->1
arr[1]-->2
arr[2]-->3
arr[3]-->4
arr[4]-->1

However Enhanced for loop gives value not the index on each iteration

replace it with the following line and you will see the same output

for(int i : arr) System.out.println(i);

why is the enhanced for loop more efficient than the normal for loop , Enhanced for loop's [1] syntax is similar to the traditional for-loop (you explicitly write [code ]for (something : collection)[/code]. Enhanced for loop’s syntax is similar to the traditional for-loop (you explicitly write for (something : collection). forEach() method uses Lambda expression to iterate over the items. The enhanced for-loop is quite more expressive, though the forEach() method is shorter.


The enhanced for loop gives you the values, but you're using them as indices. To make the enhanced for loop equivalent to the traditional for loop, just use the value instead of accessing the array.

for(int value : arr) System.out.println(value);

What is the difference between enhanced for loop and for each , This means you have to use a regular For loop for getting each object in the array so it takes time to give an index and get each object one by  In this particular case, using lambda expression is not superior than using enhanced for loop. The main advantage of using the forEach() method is when it is invoked on a parallel stream, in that case we don't need to wrote code to execute in parallel. The following code will execute in parallel:


Let's look at the conventional loop first:

for(int i = 0; i < n; i++) System.out.println(arr[i]);

In this case, i is the index into the array arr. So when you write:

`arr[i]`, you're getting the element at position `i`.

Now the enhanced for loop:

for(int i : arr) System.out.println(arr[i]);

In this case, i is not an index, but is instead the value stored in the array. So when you write arr[i], what you're doing is taking a value out of the array (i), treating as if it were an index, and getting the value out of the array at that new index.

If you want your enhanced loop to function the way you expect, do this:

for(int i : arr) System.out.println(i);

Though using i as a variable name there is poor practice, since it's usually expected that i is an index, so use some name other than i there if you want to make the code clearer.

What is difference between Normal For loop and Enhanced For , Enhanced for loop was added way back in 2004 in Java and it This is possible in traditional "for" loop because you have access to the index. Re: traditional for loops vs enhanced for loop help Because you have two arrays and you want to map from one to the other, ie the index of one maps to the index of the other, then an enhanced for-loop makes no sense. They use iterators generally, so the index is not available to you.


5 Examples of Enhanced for loop in Java, Although you might know methods like finding the size of the array and then iterating through each element of the array using the traditional for  As of Java 5, the enhanced for loop was introduced. This is mainly used to traverse a collection of elements including arrays. Syntax. Following is the syntax of enhanced for loop −


For-Each Example: Enhanced for Loop to Iterate Java Array, The so-called enhanced for loop is a simpler way to do this same thing. wish to step through the elements of the array in first-to-last order, and you do not need  The foreach loop is improved for loop that is easy to read and write. The difference between for Loop and foreach loop is that the for loop is a general purpose control structure while the foreach loop is an enhanced for loop that is applicable only to arrays and collections. Reference: 1.Programiz, Java for-Each Loop (Enhanced for Loop).


"Enhanced" For Loops, Typically, in this AP course, we will iterate through arrays (and ArrayLists that we will study later.) enhanced for loop, traditional for loop. int[] scores = {99, 75, 82}; Java for-each Loop (Enhanced for Loop) In this tutorial, we will learn about another form of for loop in Java known as enhanced for loop or for each loop with the help of examples. In Java, while working with arrays and collections, we can use the enhanced form of for loop.