c=float(input('temp?'))
f=c*9/5+32
print('temp',f)

s='abcd'
s[::-1]

s[::-1]
Out[14]: 'dcba'

for i in range(1,10):
    for j in range(1,10):
        print(i,'*',j,'=',i*j,'\t',sep='',end='')
    print()

#99乘法表