Community
Learn
Tools Library
AI Tools
Leisure
search
English
Home > Backend Development > PHP Tutorial > 帮忙看看这2个正整数的表达式一样吗

帮忙看看这2个正整数的表达式一样吗

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB
Release： 2016-06-20 12:46:40
Original
810 people have browsed it

/^[1-9]+$/

/^[1-9]*[1-9][0-9]*$/

这有区别么？

目的只是排除负数和0的正整数  只能是整数


回复讨论(解决方案)

第一个不允许有 0
第二个允许有 0
你说他们一样吗？

第一个都是1-9的数字
第二个尾数有可能是0的数字

第一个不许有0
第二个第一位数字不许是0

Related labels：
帮忙看看这2个正整数的表达式一样吗
source：php.cn
Previous article：请教 php5.2版本是不是不支持类的自动注册 Next article：请问下Laravel与andriod的app通信
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
Team collaboration - What should I do if someone needs the feature I wrote as a dependency in git flow?
From 1970-01-01 08:00:00
0
0
0
Objective-c - Constraints for iOS a warning issue
From 1970-01-01 08:00:00
0
0
0
Confusion about using gitlab's fork&pull request mode within the team
From 1970-01-01 08:00:00
0
0
0
Objective-c - In iOS development, Instagram cannot be authorized after logging in. Instagram does not jump back to the application. How to get the callback address?
From 1970-01-01 08:00:00
0
0
0
Version Control - About the use of SVN and GIT in company projects?
From 1970-01-01 08:00:00
0
0
0
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template