判断质数

#任意质数
def zhishu(n):
    if n < 2:
        return False
    for i in range(2, n):
        if n % i == 0:
            return False
    return True


for i in range(2, 101):
    if zhishu(i):
        print(i,end=" ")

def pri(n,m):
    ret = []
    for i in range(n,m+1):
        for j in range(2,i):
 if i % j == 0:
 break
 else:
 if i >1:
 ret.append(i)
 return ret
print(pri(-221,200))

 

#找出100到200的质数

# def pri(n,m):
#     ret = []
#     for i in range(n,m+1):
#         for j in range(2,i):
#             if i % j == 0:
#                 b = i
#             ret.append(b)
#     return ret
# a = set(range(100,201))
# print(a-set(pri(100,200)))



# def pri(n,m):
#     ret = []
#     for i in range(n,m+1):
#         for j in range(2,i):
#             if i % j == 0:
#                 break
#         else:
#             ret.append(i)
#     return ret
# print(pri(100,200))