表达式LEN(SUBSTR("1234586",5,1))*Len("visualFoxPro")的结果是
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![表达式LEN(SUBSTR(](/uploads/image/z/7153989-69-9.jpg?t=%E8%A1%A8%E8%BE%BE%E5%BC%8FLEN%28SUBSTR%28%221234586%22%2C5%2C1%29%29%2ALen%28%22visualFoxPro%22%29%E7%9A%84%E7%BB%93%E6%9E%9C%E6%98%AF)
表达式LEN(SUBSTR("1234586",5,1))*Len("visualFoxPro")的结果是
表达式LEN(SUBSTR("1234586",5,1))*Len("visualFoxPro")的结果是
表达式LEN(SUBSTR("1234586",5,1))*Len("visualFoxPro")的结果是
Len("visualFoxPro") = 12
LEN(SUBSTR("1234586",5,1)) = 1
12*1 = 12