Help me in solving PPSC88 problem

help
,
1

My issue

pls explain this problem

My code

n = int(input())
isPrime = True # Assume n is prime

i = 2
while i < n:
    # Update your code below this line
    n%i==0
    isprime=False
    break
i=i+1
    
    
    
if isPrime:
    print('Yes')
else:
    print('No')

Learning course: CEMP: Programming in Python
Problem Link: Coding problem - 4 in CEMP: Programming in Python