名字的正则表达式 [英] regular expression for first name

问题描述

我想要一个满足条件的名字的正则表达式

1.只允许字符

2.只有第一个字母需要是大写字母后跟小写字母

I want a regular expression for first name that satisfies the conditions
1.Only characters allowed
2. only first letter need to be capital letter followed by small letters

推荐答案

您好，

试试这个

Hello ,
Try This

^[A-Z][a-z]{3,19}

和解释是

and Explanation is

^ assert position at start of the string
[A-Z] match a single character present in the list below
A-Z a single character in the range between A and Z (case sensitive)
[a-z]{3,19} match a single character present in the list below
Quantifier: {3,19} Between 3 and 19 times, as many times as possible, giving back as needed [greedy]
a-z a single character in the range between a and z (case sensitive)

在 string

和现场演示 试试这个

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