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What is 0.01 here not 0.01 here 0.009999999999999?
From: |
Jean Louis |
Subject: |
What is 0.01 here not 0.01 here 0.009999999999999? |
Date: |
Fri, 02 Apr 2021 16:42:42 +0300 |
I would like to get a number increased for 0.01:
(defun rcd-vc-increase-decimal-revision-number (nn.nn)
(let* ((nn.nn (format "%s" nn.nn))
(nn.nn (format "%.2f" (string-to-number nn.nn)))
(nn.nn (string-to-number nn.nn)))
(+ nn.nn 0.01)))
But result is not what I want, as I want to get 10.13, though it is
tiny loss:
(rcd-vc-increase-decimal-revision-number "10.12") → 10.129999999999999
I found how to solve it, but maybe there is better way to round the
decimals behind the dot?
(defun rcd-vc-increase-decimal-revision-number (nn.nn)
(let* ((nn.nn (format "%s" nn.nn))
(nn.nn (format "%.2f" (string-to-number nn.nn)))
(nn.nn (string-to-number nn.nn)))
(string-to-number (format "%.2f" (+ nn.nn 0.01)))))
(rcd-vc-increase-decimal-revision-number "10.12") → 10.13
Jean
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- What is 0.01 here not 0.01 here 0.009999999999999?,
Jean Louis <=
- Re: What is 0.01 here not 0.01 here 0.009999999999999?, Stefan Monnier, 2021/04/02
- Re: What is 0.01 here not 0.01 here 0.009999999999999?, Jean Louis, 2021/04/02
- Re: What is 0.01 here not 0.01 here 0.009999999999999?, John Yates, 2021/04/02
- Re: What is 0.01 here not 0.01 here 0.009999999999999?, Jean Louis, 2021/04/02
- Re: What is 0.01 here not 0.01 here 0.009999999999999?, John Yates, 2021/04/02
- Re: What is 0.01 here not 0.01 here 0.009999999999999?, Jean Louis, 2021/04/02
- Re: What is 0.01 here not 0.01 here 0.009999999999999?, Arthur Miller, 2021/04/03
- Re: What is 0.01 here not 0.01 here 0.009999999999999?, Jean Louis, 2021/04/03