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Python文法詳解
book

Python文法詳解

by 石本 敦夫
September 2014
Intermediate to advanced
332 pages
6h 48m
Japanese
O'Reilly Japan, Inc.
Content preview from Python文法詳解
17
2.3 式と代入文
2.3
 式と代入文
代入文は、整数や文字列などのオブジェクトに、
=
記号で名前を指定します。
>>> spam = '

'
>>> ham = 'Ham'
数値や文字などの演算には、次の演算子が用意されています(表
2-1
)。
2-1
 数値や文字などの演算子
演算子 意味
x + y x
y
の加算
x - y x
y
の減算
x * y x
y
の乗算
x / y x
y
の除算
x // y x
y
の整数除算
x % y x
y
の剰余
-x x
の符号を反転した値
+x x
の符号を反転しない値
x ** y x
y
加算や乗算は文字列にも使えます。
>>> 10 * 20 + 4
204
>>> 'Spam' + 'Ham' + 'Egg'
'SpamHamEgg'
>>> 'Spam' * 3
'SpamSpamSpam'
Python
には、除算に
2
つの種類があります。
/
演算子による通常の除算は、浮動小数点数で除
算の結果を返します。
>>> 10 / 3 #
除算
3.3333333333333335
//
演算子による整数除算は、
C
言語などでの整数同士の除算と同じで、除算の結果を整数の値
として返します。
>>> 10 // 3 #
整数除算
3
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Publisher Resources

ISBN: 9784873116884Other