Real
例題
すべて開くすべて閉じる例 (1)基本的な使用例
スコープ (11)標準的な使用例のスコープの概要
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In[1]:=1

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https://wolfram.com/xid/0bufbv-gabrpl
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Out[1]=1

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In[2]:=2

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https://wolfram.com/xid/0bufbv-gbvn9t
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Out[2]=2

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In[1]:=1

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https://wolfram.com/xid/0bufbv-f8whv1
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Out[1]=1

任意精度実数は機械数に多すぎる桁が与えられたときに使われる:
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In[2]:=2

✖
https://wolfram.com/xid/0bufbv-ljr2g7
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Out[2]=2

その確度(Accuracy)は小数点の右側の桁数に基づく:
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In[3]:=3

✖
https://wolfram.com/xid/0bufbv-fdgkhj
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Out[3]=3

指定精度(Precision)の実数を入力する:
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In[1]:=1

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https://wolfram.com/xid/0bufbv-h9e8m3
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Out[1]=1

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In[2]:=2

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https://wolfram.com/xid/0bufbv-mvey5
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Out[2]=2

指定の確度(Accuracy)の実数を入力する:
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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-c3x64i
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Out[1]=1

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In[2]:=2

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https://wolfram.com/xid/0bufbv-q3lj4
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Out[2]=2

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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-ck6i0s
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Out[1]=1

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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-ygl1w
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Out[1]=1

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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-j96cty
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Out[1]=1

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In[2]:=2

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https://wolfram.com/xid/0bufbv-ijlby5
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Out[2]=2

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In[3]:=3

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https://wolfram.com/xid/0bufbv-iyp63
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Out[3]=3

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In[4]:=4

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https://wolfram.com/xid/0bufbv-bhaq9y
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Out[4]=4

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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-cmt32p
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Out[1]=1

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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-d6c9x9
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Out[1]=1

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In[2]:=2

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https://wolfram.com/xid/0bufbv-cu32w1
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Out[2]=2

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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-clza8l
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_Realはパターンにおける実数を表すのに使うことができる:
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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-ht62dv
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Out[1]=1

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In[2]:=2

✖
https://wolfram.com/xid/0bufbv-ofcroy
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Out[2]=2

アプリケーション (4)この関数で解くことのできる問題の例
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In[1]:=1

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https://wolfram.com/xid/0bufbv-bzqk2s
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In[2]:=2

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https://wolfram.com/xid/0bufbv-bltd58
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Out[2]=2

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In[3]:=3

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https://wolfram.com/xid/0bufbv-j9q75k
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Out[3]=3

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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-rqxuf
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In[2]:=2

✖
https://wolfram.com/xid/0bufbv-dgl9x3
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Out[2]=2

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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-p7hla
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In[2]:=2

✖
https://wolfram.com/xid/0bufbv-d9uvhi
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Out[2]=2

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In[3]:=3

✖
https://wolfram.com/xid/0bufbv-qrn3e8
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Out[3]=3

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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-eq8511
Direct link to example
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In[2]:=2

✖
https://wolfram.com/xid/0bufbv-c449ld
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Out[2]=2

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In[3]:=3

✖
https://wolfram.com/xid/0bufbv-ckxiqm
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In[4]:=4

✖
https://wolfram.com/xid/0bufbv-n3i8b
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Out[4]=4

特性と関係 (5)この関数の特性および他の関数との関係
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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-gv7mmu
Direct link to example
Out[1]=1

Realは実数の近似に使われる:
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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-cw2q1o
Direct link to example
Out[1]=1

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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-omy7nc
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Out[1]=1

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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-t25z6
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Out[1]=1

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In[2]:=2

✖
https://wolfram.com/xid/0bufbv-kj9ygz
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Out[2]=2

Realsを仮定に使い領域条件を示す:
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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-bcjzkx
Direct link to example
Out[1]=1

考えられる問題 (1)よく起る問題と予期しない動作
Realは単に近似実数の頭部である:
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In[1]:=1

✖
https://wolfram.com/xid/0bufbv-bt8cp6
Direct link to example
Out[1]=1

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In[2]:=2

✖
https://wolfram.com/xid/0bufbv-bbn4g6
Direct link to example
Copy to clipboard.
In[3]:=3

✖
https://wolfram.com/xid/0bufbv-c9g8jo
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Out[3]=3

Wolfram Research (1988), Real, Wolfram言語関数, https://reference.wolfram.com/language/ref/Real.html (1996年に更新).
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✖
Wolfram Research (1988), Real, Wolfram言語関数, https://reference.wolfram.com/language/ref/Real.html (1996年に更新).
テキスト
Wolfram Research (1988), Real, Wolfram言語関数, https://reference.wolfram.com/language/ref/Real.html (1996年に更新).
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✖
Wolfram Research (1988), Real, Wolfram言語関数, https://reference.wolfram.com/language/ref/Real.html (1996年に更新).
CMS
Wolfram Language. 1988. "Real." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 1996. https://reference.wolfram.com/language/ref/Real.html.
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✖
Wolfram Language. 1988. "Real." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 1996. https://reference.wolfram.com/language/ref/Real.html.
APA
Wolfram Language. (1988). Real. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Real.html
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✖
Wolfram Language. (1988). Real. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/Real.html
BibTeX
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✖
@misc{reference.wolfram_2025_real, author="Wolfram Research", title="{Real}", year="1996", howpublished="\url{https://reference.wolfram.com/language/ref/Real.html}", note=[Accessed: 07-April-2025
]}
BibLaTeX
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✖
@online{reference.wolfram_2025_real, organization={Wolfram Research}, title={Real}, year={1996}, url={https://reference.wolfram.com/language/ref/Real.html}, note=[Accessed: 07-April-2025
]}