Hello, This may seem rather basic, but I was wondering why my repeat/while isn't working. The thing is, when I change the wait time in the value added to a to a bigger number, it works. Here is the code:
a = 0
repeat
a = a + 0.1
wait(0.1)
print(a)
until a == 1
Also, here is my while loop:
a = 0
while a ~= 1 do
a = a + 0.1
wait(0.1)
print(a)
end
I don't know if it is a problem with my code or Roblox Studio. Thanks for reading!
I added an extra print to your code for testing purposes.
a = 0
repeat
a = a + 0.1
wait(0.1)
print(a, a == 1)
until a == 1
Alright, so now it will both print a and if a equals 1.
Take a look at the output I get:
0.1 false
0.2 false
0.3 false
0.4 false
0.5 false
0.6 false
0.7 false
0.8 false
0.9 false
1 false ---> WHHAAATTTT
1.1 false
...
How is this possible? It prints as 1, but at the same time states it doesn't equal 1.
Well, this is the annoying thing about comparing numbers. I can't seem to find the wiki article that talks about it, but basically a doesn't equal 1.
It's much more likely to equal something like 1.0000041545. This would cause the comparison to be false.
This is why, when comparing numbers, it's much better do use >= and <= for 'greater than or equal to' and 'less than or equal to' respectively. This will allow for numbers slightly greater or slightly less than the number you're comparing it to, so it will be true even with weird decimals.
a = 0
repeat
a = a + 0.1
wait(0.1)
print(a)
until a >= 1
That does help, and I will accept this answer, but the strangest thing is that it should be computing exactly 0.1. When it to a = a + 0.2, it does work. I think this is a problem with studio, but for the moment, you solution has helped me. Thanks!
Yeah it's really weird and someone smarter than me could explain it more technically.
It would have gone too fast for you to see, I guess.
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1 comment
What exactly isn't working about it?