"""

    while循环
        while 布尔型:

    for循环
        for i in range():

        for s in str:


"""

def whileSum():
    # 求1-100的和
    i = 1
    # 计算和的变量
    sum = 0
    while i <= 100:
        sum += i
        i += 1
    return sum

# 定义一个函数可以求1-指定数的和
def forSum(num):
    sum = 0
    for i in range(1,num+1):
        sum +=i
    return sum

# 求1-100的奇数的和
def forJiSum(num):
    sum = 0
    for i in range(1,num+1):
        if i%2!=0:
            sum += i
    return sum

if __name__ == '__main__':
   print(whileSum())
   print(forSum(200))
   print(forJiSum(100))