Please help me explain how this works

Question

I found it as someone's comment.
It's a program for checking if the input number is a prime.
n=0
i=2
x=int(input("input a number: "))
while i<=x:
if (x%i == 0):
n+=1
i+=1
if n==1:
print("It is a prime number.")
else:
print("It is not a prime number.")

Answer 1

Your code checks all integers from 2 up to and including x to see if each number exactly divides x. If it only finds one such number (i.e. x itself) it confirms that x is prime.

Answer 2

It takes an input x then runs a loop from 2 to x. It then checks if the remainder of x/i is zero incrementing n(found non-prime) then increments i to move onto the next factor...

It would be better like this:
num=int(input("Enter a number"))
count=0
for i in range(2,num):
if num%i==0: count+=1

if count>0:
print('not prime')
else: print('Prime')