{"image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/m/mtiit/20190708/20190708105146.png","provider_name":"Hatena Blog","author_name":"mtiit","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.mtioutput.com%2Fentry%2Flinux-bc-handson\" title=\"\u3010Linux\u3011bc\u30b3\u30de\u30f3\u30c9\u3067\u5c0f\u6570\u70b9\u3092\u542b\u3093\u3060\u639b\u3051\u7b97\u5272\u308a\u7b97\u3092\u884c\u3046 - (O+P)ut\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["UNIX","UNIX-Linux"],"url":"https://www.mtioutput.com/entry/linux-bc-handson","height":"190","version":"1.0","blog_url":"https://www.mtioutput.com/","type":"rich","title":"\u3010Linux\u3011bc\u30b3\u30de\u30f3\u30c9\u3067\u5c0f\u6570\u70b9\u3092\u542b\u3093\u3060\u639b\u3051\u7b97\u5272\u308a\u7b97\u3092\u884c\u3046","provider_url":"https://hatena.blog","width":"100%","published":"2020-11-25 17:35:30","author_url":"https://blog.hatena.ne.jp/mtiit/","description":"\u3084\u308a\u305f\u3044\u3053\u3068 \u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5c0f\u6570\u70b9\u3092\u542b\u3093\u3060\u6570\u5024\u306e\u56db\u5247\u6f14\u7b97\u3092\u884c\u3044\u305f\u3044\u3002 $ echo $((3*6*5.1)) -bash: 3*6*5.1: syntax error: invalid arithmetic operator (error token is \".1\") \u74b0\u5883\u60c5\u5831 Debian GNU/Linux 9 \u3084\u308a\u65b9 bc\u30b3\u30de\u30f3\u30c9\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3059\u308c\u3070 # apt-get install bc ... Selecting previously unselected package bc. (Reading database ... 105706 files and directories c\u2026","blog_title":"(O+P)ut"}