Python prime number generator using generators

Last update on December 21 2024 07:30:10 (UTC/GMT +8 hours)

Write a Python program that creates a generator function that generates all prime numbers between two given numbers.

A prime number (or a prime) is a natural number greater than 1 that is not a product of two smaller natural numbersFor example, 5 is prime because the only ways of writing it as a product, 1 × 5 or 5 × 1, involve 5 itself.

Sample Solution:

Python Code:

def is_prime_num(n):
    # Check if the number is prime
    if n < 2:
        return False
    for i in range(2, int(n ** 0.5) + 1):
        if n % i == 0:
            return False
    return True

def prime_numbers(start, end):
    # Generate prime numbers between start and end
    for num in range(start, end + 1):
        if is_prime_num(num):
            yield num

# Accept input from the user
start = int(input("Input the starting number: "))
end = int(input("Input the ending number: "))

# Create the prime numbers generator
prime_gen = prime_numbers(start, end)

# Generate and print all prime numbers
print("Prime numbers between", start, "and", end, "are:")
for prime in prime_gen:
    print(prime, end=",")

Sample Output:

Input the starting number: 1
Input the ending number: 30
Prime numbers between 1 and 30 are:
2,3,5,7,11,13,17,19,23,29,

Input the starting number: 100
Input the ending number: 200
Prime numbers between 100 and 200 are:
101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,181,191,193,197,199,

Explanation:

In the above exercise,

• The "is_prime_num()" function is used to check whether a number is prime. It iterates from 2 to the square root of the number and checks for any divisors.
• The prime_numbers generator function generates prime numbers between the given start and end numbers. It iterates from start to end and checks each number whether it is prime using the is_prime function. If it is prime, it yields the number.
• The program accepts starting and ending numbers from the user. It then creates the prime_numbers generator using these input values. Finally, it iterates over the generator and prints all the prime numbers in the specified range.

Flowchart:

Python Code Editor:

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