凯撒密码、GDP格式化输出、99乘法表

1.

a=input('明文:')
print('密文：',end='')
for i in a:
print(chr(ord(i)+3),end='')

2

print('{0:''<5}{1:<6}{2:<7}'.format('国家名称','GDP总量','(人民币亿元)'))
print('{0:''<7}{1:<1}{2:,.2f}'.format('中国','¥',765873.4375))
print('{0:''<5}{1:<1}{2:,.2f}'.format('澳大利亚','¥',78312.4375))

 

3

for i in range(1,10):
for j in range(1,i+1):
print('{}*{}={}\t'.format(j,i,j*i),end='')
print()