def prime_number(n):
c = 0
for x in range(2, n):
if n % x == 0:
c = c + 1
return c
n = int(input("Enter a number = "))
if prime_number(n) == 0:
print("Prime number.")
else:
print("Not prime number.")a=int(input('print number:'))
for i in range(2,a):
if a%i !=0:
continue
else:
print("Its not a prime number")
break # here break is exicuted then it means else would not be exicuted.
else:
print("Its a prime number")# This shows how we can use for + else using a break in between
for x in range(1,101):
# if you want to find whether a user input is a prime number
# use the following insted of the first for loop
# x = int(input("Type a number: "))
for i in range(2, x):
if x % i == 0:
print(x, "is not a prime number.")
break
else:
print(x, "is a prime number.")
# This will print all the numbers from 1-100,
# in the same line will print whether it is a prime or not
# if you use the user input method
# when you type 9, the output will be:
# 9 is not a prime number.
# when you type 7, the output will be:
# 7 is a prime number.start_num , end_num = input("enter 2 number sepreted by ,:").split(",")
start_num , end_num = int(start_num) , int(end_num)
for number in range(start_num , end_num+1):
is_prime = True
for counter in range(2,number):
value = number % counter
if value == 0:
is_prime = False
break
if is_prime == True:
print(number)
a=int(input("Enter number: "))
k=0
for i in range(2,a//2+1):
if(a%i==0):
k=k+1
if(k<=0):
print("Number is prime")
else:
print("Number isn't prime")a=int(input('number:'))
if a % 2 ==0 and a / 2 <= 2:
print('composite')
elif a % 3 == 0 and a/3 <= 2:
print('composit')
elif a % 5 == 0 and a/5 <= 2 :
print('composit')
elif a % 7 == 0 and a/7 <= 2:
print('composit')
else:
print('prime')
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