What is the difference between foreach and for loop in java

For-each loops do not keep track of index. Hello, The main difference between for and for each loop is to set the number of iteration manually. In for loop you have to set the number of iteration manually while in for each loop the iteration will be counted automatically as per the length of an array. Following the example of both loops respectively.

The main difference is that, you can set the number of iterations in for loop by adjusting counter value. Whereas in foreach loop, the iterations depend on the number of values of the array. In this the iterations depend on the number of values on the array. Foreach Loop:- Details are following. For example an array have 5 value then loop run 5 times. Employe Name is Surinder. Employe Name is Rahul. Employe Name is Manoj. Employe Name is Bharti.

Employe Name is Rana. Employe Name is Manish. For Loop:- Details are following. This will print as following. Other Related Discussions. From Microsoft documentation: for initialization; test; increment statement initialization Required. Statement to be executed if test is true. Can be a compound statement.

Empty; s! ToString ; Console. WriteLine s ;. Francesco Baruchelli Francesco Baruchelli 6, 2 2 gold badges 34 34 silver badges 37 37 bronze badges. GetEnumerator ; var element; while enumerator. Indeed, you do not need to implement neither IEnumerable nor IEnumerator. Some derived points: foreach does not need to know the collection length so allows to iterate through a "stream" or a kind of "elements producer".

It depends on what you are doing, and what you need. Matt Caton 3, 21 21 silver badges 25 25 bronze badges.

NoName NoName 12 12 silver badges 24 24 bronze badges. Apologies for the trivial edit - it was the only way I could remove my accidental downvote — Matt Caton. Difference Between For and For Each Loop in C For Loops executes a block of code until an expression returns false while ForEach loop executed a block of code through the items in object collections.

Pashupati Khanal Pashupati Khanal 3 3 silver badges 11 11 bronze badges. Additionally, in 'for' loop we can update the collection whereas in 'foreach' loop we cannot change the collection once the loop is executed. Maziar Aboualizadehbehbahani Maziar Aboualizadehbehbahani 1, 17 17 silver badges 36 36 bronze badges. What looks like a simple loop on the outside is actually a complex data structure called an enumerator: An enumerator is a data structure with a Current property, a MoveNext method, and a Reset method.

So when should you use a foreach-loop, and when should you use a for-loop? Avid Programmer Avid Programmer 1, 17 17 silver badges 27 27 bronze badges. The major difference between the for and foreach loop in c we understand by its working: The for loop: The for loop's variable always be integer only. The For Loop executes the statement or block of statements repeatedly until specified expression evaluates to false. In for loop we have to specify the loop's boundary maximum or minimum.

The foreach loop: In the case of the foreach loop the variable of the loop while be same as the type of values under the array. Guillaume Jacquenot 9, 5 5 gold badges 41 41 silver badges 48 48 bronze badges. Many answers are already there, I just need to identify one difference which is not there.

It goes into infinite loop but does not fail. S Kumar S Kumar 6 6 silver badges 19 19 bronze badges. Saideep Chhetri Saideep Chhetri 1 2 2 bronze badges. Subtract start. Saeed Zhiany 1, 7 7 gold badges 26 26 silver badges 37 37 bronze badges.

Lakshmanan Dhamotharan Lakshmanan Dhamotharan 1 1 silver badge 5 5 bronze badges. Welcome to SO, I think it worthed if you can provide some result of your test to show how much significant difference exists between them. SaeedZhiany I edited my post due to content size. I added performance details with example. Peter Binsu.

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This type of off-by-one-bug is a logic error when your iterative loop iterates one more or less than you anticipated. In a forEach method, we pass each food type within that iteration into the callback. A for loop needs you to access the array using a temporary i variable. While this might not seem very messy in the beginning, it can get more cluttered when you begin to add more code.

Having to use the temporary i and j variables can add a lot of confusion to your code. One main reason why I would use the for loop is if I needed to break out of a loop early. If you wanted to only return a certain food in your array, you could use an if statement to check if your criteria matches, and then break out from the loop.