初学者提问，如何用函数输出

Question

Answer 1

def leapYear(n):
    return n%4==0 and n%100!=0 or n%400==0
    
while True:
    n=input('请输入年份：')
    if n=='stop':
        print('Bye!')
        break
    if not n.isdigit() or int(n)<0:
        print('错误，请重新输入!')
        continue
    n=int(n)
    if leapYear(n):
        print('Yes')
    else:
        print('No')