如何计算两个指数数之间的差

Question

I want to use python to calculate the difference between two exponential number

a = 4,592e+9
b = 7,892e+9
c = b - a
print ('c = ',c)

I get the following error message:

TypeError: unsupported operand type(s) for -: 'tuple' and 'tuple'

Answer 1

Simply replace the , with .

a = 4.592e+9
b = 7.892e+9
c = b - a
print ('c = ',c)

Answer 2

Replacing , with . will sort out your issue as you are trying to perform mathematical operations on a float value.

Working Code:

a = 4.592e+9
b = 7.892e+9
c = b - a
print ('c = ',c)

Answer 3

You get that error because a and b are both tuples not real exponential numbers . If you print the value of a you'd get (4, 592000000000.0) . The problem is with the declaration of a and b, just change the , with . . So:

a = 4.592e+9
b = 7.892e+9
c = b - a 
print ('c = ',c)