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Python Program to Check Prime Number

Python Program to Check Prime Number

In this example, we will see a python program to check if the given input number is a prime number or not.

A prime number is a natural number greater than 1 which has no positive divisor other than 1 and itself. Like 3, 7, 11 etc. are prime numbers.

Other natural numbers that are not a prime number are called as composite numbers. Like 4, 6, 9 etc. are composite numbers.

Example :

num = int(input("Enter a number: "))  
if num > 1:  
for i in range(2,num):  
if (num % i) == 0:  
print(num,"is not a prime number")  
print(i,"times",num//i,"is",num)  
break  
else:  
print(num,"is a prime number")  
else:  
print(num,"is not a prime number")  

Output:
Enter a number: 25
25 is not a prime number
5 times 5 is 25
Output:
Enter a number: 13
13 is a prime number

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