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Is there a way to input something like 1*10**2?

原文 2020-10-20 00:36:09 2 2 python

what the title says

when i try to input a number in the form of a scientific notation like 1*10**12 in this code:

h = float(input.('enter the value of [H+]: '))

I get this error

h = float(input('enter the value of [H+]: '))
ValueError: could not convert string to float: '1*10**12'

2 answers

Just enter "1e22" and convert it with float. "1e22" is python notation for 1x10^22.

标准语法是使用 little e来表示具有 10 次幂的浮点文字，例如1e2在浮点表示中是1*(10**2)

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