Prime Number in Python using Function

Learn about Prime Number in Python using Function in the below code example. Also, refer to the comments in the code snippet to get a detailed view about what’s actually happening.

A prime number is a positive integer greater than 1 that can be divided by 1 and itself.

Contents

Prime Number in Python using Function

The below code snippet checks whether the given number is a prime or not. The function isPrime() returns True if the given number is a prime number else returns False.

Program:

# Python program to check if a number is prime or not

#user-defined function
def isPrime(num): 
    if num > 1:
        for i in range(2, num//2):
            if (num % i) == 0:
                return False
                break
        else:
            return True
    else:
        return False

# input number
num = int(input('Enter a number: '))

# calling function and display result
if(isPrime(num)):
    print(num, "is a prime number")
else:
    print(num, "is not a prime number")

Output:

Enter a number: 5
5 is a prime number

Hope above code works for you and Refer the below Related Codes to gain more insights. Happy coding and come back again.