嵌套循环（九九乘法表；1-100奇数项和偶数项求和）

# 九九乘法表
for m in range(1,10):
    for n in range(1,m+1):
        print("{0}*{1}={2}".format(n,m,(n*m)),end="\t")
    print()#换行

# 1-100的总和，奇数项和，偶数项和
sum_all = 0
sum_odd = 0
sum_even = 0
for i in range(1,101):
    sum_all += i
    if i % 2 == 1:
        sum_odd += i
    else:
        sum_even += i
print("1-100的总和为{0}，奇数项和为P{1}，偶数项和为{2}".format(sum_all,sum_odd,sum_even))

# 使用列表和字典存储表格的数据
r1 = dict(name = "张三", age = 18, city = "北京", salary = 12000)
r2 = dict(name = "李四", age = 20, city = "上海", salary = 15000)
r3 = dict(name = "王五", age = 28, city = "深圳", salary = 18000)
tb = [r1,r2,r3]
for i in tb:
    if i.get("salary") >=15000: 
        print(i)