Python 教程基础一 课后作业一

#Python 练习题
#使用while循环输入1 2 3 4 5 6 8 9 10
count = 0
while 1:
    count += 1 # count = count + 1
    if count == 7: continue
    if count == 11: break
    print(count)
    
#求1-100所有数的和
count = 1
sum = 0
while count <= 100:
    sum = sum + count 
    count += 1 # count = count + 1
print(sum)

#输出1-100以内所有的奇数
count = 1
while count <= 100:
    judge_num = count % 2
    if judge_num == 1:
        print(count)
    count += 1 # count = count + 1
    
#输出1-100以内所有的偶数
count = 1
while count <=100:
    judge_num = count % 2
    if judge_num == 0:
        print(count)
    count += 1 # count = count + 1
    
#求1-2+3-4+5 ...99的说有数的和
count = 1
sum = 0
while count <= 99:
    judge_num = count % 2
    if judge_num == 1:
        sum = sum + count
    else:
        sum = sum -count
    count += 1 # count = count + 1
print(sum)

#用户登录（三次机会重试）
count = 1
while count <= 3:
    log_in = input('请输入用户名：')
    if log_in == 'lostpanda': break
    count += 1 # count = count + 1