2019年5月10日 · in the above for loop the exit condition checks if i is less than 10 (i < 10) which is true because in the first instance i = 0, as a result the loop goes into the code block and runs the code then increments and continues until the exit condition is no longer true.

2016年12月17日 · You are using the post-decrement operator. This is because you are writing result--but not --result. The value of the expression result--is a copy of result, it is defined before the decrementing. That's why it's called post-decrement. After the value of the expression result--is defined, result is decremented.

I want to have a for loop like so: for counter in range(10,0): print counter, and the output should be 10 9 8 7 6 5 4 3 2 1

2009年9月28日 · Python does not have unary increment/decrement operators (--/++). Instead, to increment a value, use . a += 1 More detail and gotchas. But be careful here. If you're coming from C, even this is different in python. Python doesn't have "variables" in the sense that C does, instead python uses names and objects, and in python ints are immutable.

2013年7月30日 · It is using a post decrement so x is modified after returning it's current value so it is really equivalent to this: while( ( x - 1) ) and the loop will run until the expression is false or in the this case 0 which is equivalent to false. So the run goes like this:

2010年9月7日 · The pre/post increment/decrement operator (++ and --) are pretty standard programing language syntax (for procedural and object-oriented languages, at least). Why doesn't Ruby support them? I understand you could accomplish the same thing with += and -= , but it just seems oddly arbitrary to exclude something like that, especially since it's so ...

2010年10月8日 · Postfix decrement (x--) is different from prefix decrement (--x). The former return the value x, then decrements it; the latter decrements and then returns the value. And if you thing how a postfix is written at low level, you'll find that it is a liiiitle slower than the prefix...

2012年8月7日 · but the first Checker in underlined also the try the = sign and the ; sign saying that Only assignment, call, increment, decrement, and new object expressions can be used as a statement. Sorry if this is hard to understand, but I'm very thankful to those who can help:D

2013年4月29日 · I want to decrement a value when user delete it in php and mysql. I want to check not to go below than 0. If value is 0 then do not decrement. mysql_query("UPDATE table SET field = field - 1 WHERE...

2012年1月23日 · Decrement loops down to zero can sometimes be faster if testing against zero is optimised in hardware. But it's a micro-optimisation, and you should profile to see whether it's really worth doing. The compiler will often make the optimisation for you, and given that the decrement loop is arguably a worse expression of intent, you're often ...