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For loop illustration, from i=0 to i=2, resulting in data1=200. A for-loop statement is available in most imperative programming languages. Even ignoring minor differences in syntax, there are many differences in how these statements work and the level of expressiveness they support.
A generator expression may be used in Python versions >= 2.4 which gives lazy evaluation over its input, and can be used with generators to iterate over 'infinite' input such as the count generator function which returns successive integers:
/* 'The i++ part is the cleanup for the for loop.' */ for i = 0; i < 100; i ++ print i end import type list = [10, 20, 30, 40, 50] /* 'Even in a for each loop, code cleanup with an incremented variable is still needed.' */ i = 0 for each element of list list [i] ^= 2 // 'Squares the element.' print string (element) +" is now... "+ string (list [i]) i ++ end
For example, a ranged loop like for x = 1 to 10 can be implemented as iteration through a generator, as in Python's for x in range(1, 10). Further, break can be implemented as sending finish to the generator and then using continue in the loop.
Numeric literals in Python are of the normal sort, e.g. 0, -1, 3.4, 3.5e-8. Python has arbitrary-length integers and automatically increases their storage size as necessary. Prior to Python 3, there were two kinds of integral numbers: traditional fixed size integers and "long" integers of arbitrary size.
While such acceptance is subjective, and often depends on individual coding habits, the following are common examples: the use of 0 and 1 as initial or incremental values in a for loop, such as for (int i = 0; i < max; i += 1) the use of 2 to check whether a number is even or odd, as in isEven = (x % 2 == 0), where % is the modulo operator
Here, the list [0..] represents , x^2>3 represents the predicate, and 2*x represents the output expression.. List comprehensions give results in a defined order (unlike the members of sets); and list comprehensions may generate the members of a list in order, rather than produce the entirety of the list thus allowing, for example, the previous Haskell definition of the members of an infinite list.
In many programming languages, only integers can be reliably used in a count-controlled loop. Floating-point numbers are represented imprecisely due to hardware constraints, so a loop such as. for X := 0.1 step 0.1 to 1.0 do. might be repeated 9 or 10 times, depending on rounding errors and/or the hardware and/or the compiler version.