4.2 Expressions of type EAX/AX/AL

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      Such expressions are used when the result can be saved as a variable in

  memory or in an EAX, AX, or AL register.

 

      If the result can be saved as a variable of type byte or char, use AL.

 

      If the result can be saved as a variable of type word or in, use AX.

 

      If the result can be saved as a variable of type dword, long or float,

  use EAX.