实例1：打印字母P

#打印字母P
print("Hello Python World!")
print('* '*7)
for i in range(5):
    print("*            *")
print('* '*7)
print('*\n'*6)

实例2：打印九九乘法表

for k in range(1,10):
    for j in range(1,k+1):
        result=j*k
        if j<k:
            print('%d*%d=%-3d'%(j,k,result),end="")
        else:
            print('%d*%d=%-3d'%(j,k,result))