August 2025
Intermediate
216 pages
5h 41m
Japanese
Content preview from Pythonレベルアップドリル 初心者から一歩進むための厳選問題集
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★★★★★
1
変数ageに任意の数値を代入し、変数ageが20以上の場合は"成年"、それ以外
の場合は" 未成年 "と出力してください。
期待する出力
成年
未成年
条件によって処理を分岐させるには、if文を使います。
条件を満たした場合にのみ実行したい処理を記述するには、if文と条件式を使い
ます。
if 条件式:
条件式がTrueのときの処理
また、条件を満たさない場合の処理も記述したい場合は、else節を使って次のよ
うに記述します。
if 条件式:
条件式がTrueのときの処理
else:
条件式がFalseのときの処理
条件式は、条件を満たしたときにはTrue（真）、満たさないときには False（偽）と
なるように記述します。条件式に用いられる主な演算子として、値を比較する比較
演算子があります。比較演算子には、次のようなものがあります。
34
比較演算子 働き 例 例の結果
...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.