=?gb2312?B?d2hhdCB0aGUgZGlmZmVyZW5jZSBiZXR3ZWVuIGFyYW5nZSgxMS4pIGFuZCBhcmFuZ2UoMTEp

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>>> x=arange(11)
>>> x
array([ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10])

>>> x=arange(11.)
>>> x
array([  0.,   1.,   2.,   3.,   4.,   5.,   6.,   7.,   8.,   9.,  10.])
>>> 
          
       what is the function of dot follow the number.
     such as 0.      1.            2.




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