如何检查字符串不与批数字开始？ [英] How to check a string does not start with a number in Batch?

问题描述

我如何检查字符串的第一个字符是字母，因此它不是一个数字，或者更确切地说，一个密码？有此字符串中没有空格或特殊字符。

How can I check that the first character of a string is a letter and so that it is not a number, or rather a cipher? There are no spaces or special characters in this string.

推荐答案

我觉得这是最简单的方法：

I think this is the simplest way:

@echo off
setlocal EnableDelayedExpansion
set digits=0123456789

set var=1something
if "!digits:%var:~0,1%=!" neq "%digits%" (
   echo First char is digit
) else (
   echo First char is not digit
)

var的第一个字符是试图从数字字符串中删除。如果这样的字符是一个数字，数字字符串的变化;否则，数字字符串保持不变。

The first character of var is tried to be removed from digits string. If such a char was a digit, digits string change; otherwise, digits string remains the same.

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