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I would like to iterate in C++ over a set of values. In python, it looks like

for v in [v1, v2, v3]:
    do_something()

What is the correct way to do it in C++?

for (const auto& v : {v1, v2, v3}) { do_something(); }

Would be equivalent (except for the fact that the elements in the initializer list will conceptually be copied - even if the optimizer elides those copies - so they will need to be copyable).

loops in python, Python programming language provides following types of loops to handle looping requirements. In Python, there is no C style for loop, i.e., for (i=0; i<n; i​++). in C# language we get an iterator object to iterate a list or a stack. in python when iterating a stack is there a good practice? – co2f2e Nov 9 '11 at 4:40 1 I Think you'll find "best practice" is heavily tied to purpose, you can iterate using list comprehensions, itertools.chain, generator sequences, map and many more.

you can use the auto keyword and a range based for loop

 std::vector<int> v = {0, 1, 2, 3, 4, 5};

 for (auto const& e:v){
      // here e is value from v
 } 

more info: https://en.cppreference.com/w/cpp/language/range-for

ForLoop, Like the while loop, the for loop can be made to exit before the given mylist = ['a​', 'b', 'c', 'd'] for i in range(len(mylist)): # do something with  Iterating Through an Iterator in Python We use the next() function to manually iterate through all the items of an iterator. When we reach the end and there is no more data to be returned, it will raise StopIteration .

Python Tutorial: For Loops, Simulating C-style loops with range. Like the while loop the for loop is a programming language statement, i.e. an iteration statement, which allows a code  You are confusing syntax with functionality. A few answers above actually allow the C++ to pick up execution from where it's left off during the last call. It's nothing magical. As a matter of fact, Python is implemented in C, so whatever is possible in Python is possible in C, albeit not as convenient. – Edy Mar 15 '19 at 20:17

Python "for" Loops (Definite Iteration) – Real Python, Another form of for loop popularized by the C programming language contains three At first blush, that may seem like a raw deal, but rest assured that Python's  Python For Loops. A for loop is used for iterating over a sequence (that is either a list, a tuple, a dictionary, a set, or a string). This is less like the for keyword in other programming languages, and works more like an iterator method as found in other object-orientated programming languages. With the for loop we can execute a set

Why is Python's for loop different from C's for loop?, If you want C like for loop behavior, looping over a call to range() is often very similar to a typical for loop used in a C program. Overall, I find Python's easier to work  I would like to iterate in C++ over a set of values. In python, it looks likeWhat is the correct way to do it in C++?

Python-Like enumerate() In C++17 – Nathan Reed's coding blog, If the iterator returns a tuple, you can pull it apart and assign the pieces to different loop variables. The syntax for this looks like: std::vector<std::  JavaScript, C, C++, Java, PHP, and a whole bunch of other programming languages all have this kind of for loop. But Python does not. Python does not have traditional C-style for loops. We do have something that we call a for loop in Python, but it works like a foreach loop. This is Python's flavor of for loop:

Comments
  • If you are able to use C++11 or higher, you can use range for loop.
  • I do not see why people are closing this question, it is a valid question.
  • You should also read: stackoverflow.com/questions/15927033/…
  • Possible duplicate of The Definitive C++ Book Guide and List
  • Unfortunately, not entirely - those variables are going to be copied into initializer list (at least semantically), so copy constructor has to be available.
  • @SergeyA Fair point. It's the closest equivalent I could think of. If you have a closer one, please post an answer and I'll upvote that and delete this one.
  • I do not know of any closer one which would be that concise, and I have a feeling it will not necessarily matter for OP, I just think you might want to make a note of that in your answer.
  • I think I'm not using C++11: "range-based 'for' loops only available with -std=c++11"
  • @heracho then I would advise getting up-to-date with the latest C++ version (currently C++17) :-) You can do the same thing in C++98, it just won't be nearly as concise, nor as readable.
  • Note that auto, auto&, const auto & and auto&& have different meanings and it's not clear which would be appropriate here.
  • @FrançoisAndrieux right thats why i included more documentation