Home/ Questions/Q 4548692
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-21T16:15:24+00:00

In the mma help docs for Position , the following is listed under Possible

  • 0

In the mma help docs for Position, the following is listed under “Possible Issues”

In[1]:= Position[Range[-1, 1, 0.05], 0.1]
Out[1]= {}

There is no explanation given though. Why does this happen? So if I really need to find the position of 0.1 in Range[-1,1,0.05], how do I do it?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    It is a numeric precision issue: 0.1 in the Range is not internally the same as 0.1 typed in. The normal way to resolve this is to compare with Equal rather than the implicit SameQ.

    Position[Range[-1, 1, 0.05], x_ /; x == 0.1]
    • 0