Strange issue with normal operations

[Gonzalo Gonza]

Hello, I was writing a very simple code and I noticed something was failing. I detected the problematic part but I CANNOT find wheres the error.

The code is:

def pri(max):
    for m in range(1,max):
        num=(m+1)/m
        if num==1: print 'ERROR'
        else: print 'OK'

The problem is that it prints:

ERROR
ERROR
ERROR
ERROR
ERROR
ERROR
ERROR
#...

Is there any syntax problem (I dont work with python since a long time)? Or a logical problem? Or my microprocessor just went crazy?

I hope you can help me.

Thank you very much.

[bvdet]

To see what is taking place, take a look at the following interaction with the interpreter:

>>> (1+1)/1
2
>>> (2+1)/2
1
>>> (3+1)/3
1
>>> (4+1)/4
1
>>> 

Integer division returns the floor.

[Gonzalo Gonza]

But which would be the correct form?
Because neither

num=(m+1)/float(m)

nor

num=(m+1)/(m*1.0)

are correct.

[bvdet]

Either would return a float. What would be correct?

[Gonzalo Gonza]

But the problem is that they return 1, not a floating point.

[bvdet]

I don't see the behavior you are describing.

>>> (1+1)/float(1)
2.0
>>> (2+1)/float(2)
1.5
>>> (3+1)/float(3)
1.3333333333333333
>>> (1+1.)/1
2.0
>>> (2+1.)/2
1.5
>>>