四则运算

print(2+3)
print(2-3)
print(2*3)
print(2/3)
print(2//3)
print(2%3)

5
-1
6
0.6666666666666666
0
2

 

a = input()
x = eval(a)
x+=1
x++ #错的
print(x)

 

>>> 6**3
216
import  math
>>> math.e**4
54.59815003314423
>>> 1/(math.e**(-1.9)+1)
0.8698915256370021