Can anyone point out my mistake? why i am not having the desired result?

Question

a = int(input('Enter a number')
b = 1
while (b<=a):
if a%b==0:
print('Prime')
else:
print('Not Prime')

Answer 1

1. There is a mistake in your input line. a= int(input())
2. All numbers are divisible by 1, so your code will present all numbers as prime.
3. Because b will be smaller than the numbers you are testing, you will get an infinite loop.

HINT:
Try using a loop starting from 2 until the input number.
Then test to see if each number in the loop is divisible to the input number.
If not: PRIME
if yes: NOT PRIME

Answer 2

Missing statement of b value incrementing.., so for greater than zero value, it is Infinite loop..
And for prime number, factors only 1, and itself.. So no need to check 1 and from 2 to that number if any divisor present then break loop by printing not prime..
It it non of divisible by any then it it prime...

Answer 3

Because any number is divisible by 1 and itself.

There would now be an infinite loop, can you fix it?

Answer 4

you have an infinite loop with a> = 1,
you need to start with b = 2, then increase it to a-1,
and if a % b == 0 is True, then
the number has more than two divisors, and is not a prime number,
the loop must be break, or the else condition, which must be after the cycle and report a prime if the loop ended without interruption. ..