TCL学习之字符串函数

这篇文章主要讲一下TCL语言中用到的字符串函数，以及它们的用法。

1.string  length :返回字符串的长度

2.string index :返回字符串相应位置的字符

3.string range:返回字符串中一个范围内的字符串

示例如下，用到了这三个函数： 

set string"this is my test string"
puts "there are [string length $string]charaters in \"string\""
puts "[string index $string 1] is the second character in\"$string\""
puts "\"[string range $string 5 10]\" are characters between the 5th and 10th"

4.string compare string1,stri