It is well defined behavior. In C11 a new clause 6.8.5 ad 6 has been added An iteration statement whose controlling expression is not a constant expression,156) that performs no input/output operations, does not access volatile objects, and performs no synchronization or atomic operations in its body, controlling expression, or (in the case of a … Read more
There is no difference in bytecode between while(true) and for(;;) but I prefer while(true) since it is less confusing (especially for someone new to Java). You can check it with this code example void test1(){ for (;;){ System.out.println(“hello”); } } void test2(){ while(true){ System.out.println(“world”); } } When you use command javap -c ClassWithThoseMethods you will … Read more
There are a number of places where the language of the Standard gives compilers freedoms beyond what are required for useful optimizations, but which would instead provide compilers with ways to throw the Principle of Least Astonishment out the window. The way the rules about endless loops are written fits that category. Most of the … Read more
You can use the second argument of iter(), to call a function repeatedly until its return value matches that argument. This would loop forever as 1 will never be equal to 0 (which is the return value of int()): for _ in iter(int, 1): pass If you wanted an infinite loop using numbers that are … Read more
The problem is that “scanf()” can leave unread data in your input buffer. Hence the “infinite loop”. Another issue is that you should validate the return value from scanf(). If you expect one integer value … and scanf returns “0” items read … then you know something went wrong. Here is an example: #include <stdio.h> … Read more
The C# compiler will transform both for(;;) { // … } and while (true) { // … } into { :label // … goto label; } The CIL for both is the same. Most people find while(true) to be easier to read and understand. for(;;) is rather cryptic. Source: I messed a little more with … Read more
How about using good(?) old goto? :loop echo Ooops goto loop See also this for a more useful example.
itertools provides three infinite iterators: count(start=0, step=1): 0, 1, 2, 3, 4, … cycle(p): p[0], p[1], …, p[-1], p[0], … repeat(x, times=∞): x, x, x, x, … I don’t know of any others in the standard library. Since you asked for a one-liner: __import__(“itertools”).count()
Yes, you can use a while True: loop that never breaks to run Python code continually. However, you will need to put the code you want to run continually inside the loop: #!/usr/bin/python while True: # some python code that I want # to keep on running Also, time.sleep is used to suspend the operation … Read more
The problem with asking this question is that you’ll get so many subjective answers that simply state “I prefer this…”. Instead of making such pointless statements, I’ll try to answer this question with facts and references, rather than personal opinions. Through experience, we can probably start by excluding the do-while alternatives (and the goto), as … Read more