Excel2003函数应用完全手册.Excel函数即是预先定义，执行计算、分析等处理数据任务的特殊公式。以常用的求和函数SUM为例，它的语法是“SUM(number1,number2,......)”。其中“SUM”称为函数名称，一个函数只有唯一的一个名称，它决定了函数的功能和用途。-Excel2003 function application completely manual. Excel function that is pre-defined, perform calculations, analyze data processing tasks such as the special formula. SUM Sum function commonly used example, the syntax is " SUM (number1, number2 ,......)" 。 Where " SUM"　function name is called, a function has a single name, which determines the function and purpose of the function.