各位大佬,刚开始自学python,我有个while套while的问题请教下

简单的一个求1到输入数的和的问题:
1、题目:
①输入一个数字,计算完成第一轮后,用户通过输入‘y’或者‘n’来决定继续执行还是结束;
②如果输入的不是‘y’或者‘n’就提示输入非法,然后重复要求用户输入y或者n;--到这一步都能实现

2、当前遇到的问题:
①当输入n时,我想结束整个程序,但目前我的代码是输入n时,只能结束判断是否继续的循环,不能结束整个循环;
②当我把break用于结束最上层的while循环时,就变成无论y或者n,都结束整个循环了;

我始终想不出该怎么实现,百度了些资料,可能是我表述的问题,一直搜不出想要的答案,求各位大佬解惑,代码如下:
while 1>0:

    a = 1
    sum = 0
    num = int(input('please input a number:'))
    while a <= num:
        sum = sum + a;
        a += 1;
    print("the sum of 1 to %d is: %d" % (num, sum));

    while True :
        pro = str(input("是否继续? 继续:y,结束:n"))
        if pro == 'y':
            break;
        if pro != 'n' and 'y':
            print('非法命令,请重新输入!')
            continue;
        else:
            print('bye')
        break;
 

pro = ''
while pro != 'n':
    a = 1
    sum = 0
    num = int(input('please input a number:'))
    while a <= num:
        sum = sum + a;
        a += 1;
    print("the sum of 1 to %d is: %d" % (num, sum));
    while True :
        pro = str(input("是否继续? 继续:y,结束:n"))
        if pro == 'y':
            break;
        if pro != 'n' and 'y':
            print('非法命令,请重新输入!')
            continue;
        else:
            print('bye')
        	break;

你需要一个变量来控制主循环  关注我学python基础

i = 1
while i:
    a = 1
    sum = 0
    num = int(input('please input a number:'))
    while a <= num:
        sum = sum + a
        a += 1
    print("the sum of 1 to %d is: %d" % (num, sum))
    
    while True:
        pro = str(input("是否继续? 继续:y,结束:n"))

        if pro != 'n' and pro != 'y':
            print('非法命令,请重新输入!')
            continue
        if pro == 'y':
            break
        if pro == 'n':
            print('bye')
            i = 0
            break

 

while True:
    a = 1
    sum = 0
    num = int(input('please input a number:'))
    while a <= num:
        sum = sum + a
        a += 1
    print("the sum of 1 to %d is: %d" % (num, sum))

    pro = str(input("是否继续? 继续:y,结束:n"))
    if pro == 'n':
        print('bye')
        break
    if pro != 'n' and pro != 'y':
        print('非法命令,请重新输入!')
        continue

没有必要写两层while,一层就够了

把第11行去掉,下面的代码回一步缩进