[英]how to decrease the decimal places in the mantissa part of an exponential number in an output in python
編碼
avogadro = 6.0225e23 # define Avogadro number
at_wt = 63.55
print ("atomic weight of copper = 63.55")
print("weight of an atom = atomic weight/Avogadro's number")
x = at_wt/ avogadro
print ("Weight of one atom of copper = {}".format(x) )
THE OUTPUT
atomic weight of copper = 63.55
weight of an atom = atomic weight/Avogadro's number
Weight of one atom of copper = 1.0552096305520962e-22
我感興趣的是在 output 1.0552096305520962e-22 中，我希望指數數的尾數部分只顯示 3 個小數點而不是這么多。 因此，我應該使用什么命令來達到預期的結果。
使用更好的格式字符串：
print ("Weight of one atom of copper = {:0.3e}".format(x) )
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