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**info**命令提供了查看TCL解釋器信息的手段， #### 變量信息 **info**命令的幾個選項提供了查看變量信息的手段。 `info exists varName ` 如果名為*varName*的變量在當前上下文(作為全局或局部變量)存在，返回1，否則返回0。
空白目錄
Tcl學習之--文件操作
info命令
puts
proc
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