2018.7.27错题

print(0 or 5 < 4) #0改False
赋值和等于的问题
字符串转换

count = 1
# number = 2
# sum = 0
# while count < 100:
#     if count < 99:
#         sum = sum + count - number
#         count = count + 2
#         number = number + 2
#     else:
#         sum = sum + count
#         count = count + 2
#         number = number + 2
# print(sum)
质数(素数):大于一的整数,除它本身和1以外,不能被其它正整数整除   

a = input("请输入一个数字:")
a = int(a)
b = 1
while a > 1:
    b = b + 1
    if a != b and a % b != 0:
        print("该数是质数")
        break
    else:
        print("该数不是质数")
        break
else:
    print("该数不是质数")