用WHILE语句计算1+1/2!+1/3!+1/4!+。。。的前20项和

如题所述

a = 1
b = 1
i = 1
While i < 20
i = i + 1
b = b * i
a = a + 1 / b
Wend
Debug.Print a
结果:2.71828182845905
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