maple如何清除已被赋值的变量啊？

zxxyx

大家好，请问maple如何清除已被赋值的变量啊？我用了unassign（变量名），可是仍旧清除不了，该如何解决啊，谢谢了

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1# zxxyx

1. 
   
2. restart; t := 1.0; whattype(t); t := 't'; whattype(t);t;
   

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quotes - ",`, and '
Description
Three different types of quotes are used in Maple for three different purposes: as string delimiters; as symbol delimiters; and as a means of delaying evaluation of an expression.
The double quote symbol (") is used as the string delimiter.
The left single quote symbol (`) is used to form a symbol.
A pair of right single quotes (' ') is used to delay evaluation of the enclosed expression --- see uneval
In earlier versions of Maple, the double quote symbol was used as the ditto operator. This facility is now provided by the percent symbol (%).

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