Even, odd, prime, factorial problem solve-12

def factorial_chk(a):
    for i in range(1,a):
        a=a*i
    i=i+1
    print(f"factorial is{a}")

def prime_chk(a):
    c=int(0)
    f=int(0)
    for c in range (2,a):
        if(a%c==0):
            print(f"{a} is not prime")
            break
        else: f=f+1
    c=c+1
    if (f==a-2):
        print(f"{a} is prime")



a = int(input("number dau  "))
if  (a==1):
    print(f"{a} is not a prime number")
elif (a % 2 == 0):
    factorial_chk(a)
else:
    prime_chk(a)