What does the ++ sign mean in this code:
for (var i=0; i < myString.length; i++) {
alert(myString[i]);
}
while (x>y) {
alert ("xrules!");
y++;
}
Asked
Active
Viewed 9,062 times
-6
chepner
- 497,756
- 71
- 530
- 681
lisa turner
- 31
- 1
- 5
-
1Na.. not everyone is going to have the coding vocabulary to search for that post in the same way. – Patrick Jan 16 '16 at 01:52
-
4Did you really just ask for an explanation of Python syntax, using a JS snippet as an example? How does that make any sense whatsoever? – TigerhawkT3 Jan 16 '16 at 02:00
-
`++` doesn't mean *anything* in Python. – chepner Jan 16 '16 at 02:34
-
1@chepner - Well, technically, `++6` means "positive positive six," so that's something... sort of... – TigerhawkT3 Jan 16 '16 at 03:04
-
@TigerhawkT3 Good point. Not an operator, but not completely unparseable. – chepner Jan 16 '16 at 14:43
2 Answers
0
It's the increment operator. It's (almost) equivalent to saying i = i + 1
Note that the increment operator does not exist in python, you have to either write the whole thing out or use the add assignment operator i += 1
Note that there are post (i++) and pre (++i) increment operators, as well as equivalent decrement operators --i i--. These operators differ on when the increment is applied, and are often a cause of frustration for new programmers.
-
thanks ktbiz. so if the increment or decrement operator is before i does it mean the same thing? – lisa turner Jan 16 '16 at 02:23
-
Not quite, hence the frustation. Here's a [discussion](http://stackoverflow.com/questions/4706199/post-increment-and-pre-increment-within-a-for-loop-produce-same-output) of the differences between the pre and post increment operators. The same applies for the decrement. – ktbiz Jan 16 '16 at 02:26
