Here is a simple example of how you can use a while loop to check if a number is prime or not in Python: def is_prime(n): if n <= 1: return False i = 2 while i*i <= n: if n % i == 0: return False i += 1 return True # Test the function for n in range(2, 10): print(f"{n}: {is_prime(n)}")

How to Find Prime Numbers in Python using While Loop. In this Python tutorial, I want to share source codes of a simple Python program which identifies whether a number is a prime number or a composite number.

inp = int(input("Enter the number: ")) isDiv = False i = 2 while i < inp: if inp%i ==0: isDiv = True print(f"{inp} is divisible by {i}.") i+=1 if isDiv: print(f"Hence {inp} is not a prime number.") else: print(f"{inp} is a prime number.")

Apr 10, 2025 · isprime () function from the SymPy library checks if a number is prime or not. It prints False for 30, True for 13 and True for 2 because 30 is not prime, while 13 and 2 are prime numbers.

Using for-loop iterate from 2 to num-1 (for i in range(2, num)). Inside for-loop check if num % i == 0 then do flag = 1 and break the loop. Outside of for-loop check if flag == 1 or num == 1 then print the given number is not prime else given number is prime.

Mar 31, 2025 · Output: [53, 59, 61, 67, 71, 73, 79, 83, 89, 97] Explanation. We use a for loop to iterate each number from start to end and check whether it is prime by using is_prime() function.; In is_prime() function, we loop from 2 to num and check if num is divisible by any number other than one and itself.. Using the modulo operator, we can find the divisor of the given num.

Oct 7, 2024 · Use a loop to check if the number has any factor other than 1 and itself. If you find a factor, set the flag to 'False' and break out the loop. Based on the flag variable, return whether the number is prime or not. Let's have a look at the Python Code. flag = True. flag = False.

Mar 31, 2025 · Explanation:. Edge case: Numbers less than or equal to 1 are immediately classified as not prime because prime numbers are greater than 1. Use of math.sqrt: The math.sqrt function calculates the square root of n.; For Loop: The loop iterates from 2 up to and including √n, significantly reducing the number of checks needed compared to iterating through all numbers up to n-1.

Step-1: iterate a for loop in range 2 to100 –> for i in range(2,101) Step-2: inside the first loop create another for loop in the range 2 to 100 –> for j in range(2,101) Step-3: check if i%j == 0 then break a loop (Because a number is not prime)

In this article, we will show how to write a Python Program to Find Prime Number using For Loop, While Loop, and Functions examples.