Code
// WAP to check the number is prime or not...(Using for loops)(v.imp ques.) #include <stdio.h> int main() { int number, prime = 1; printf("Enter the number\n"); scanf("%d", &number); for (int i = 2; i * i < number; i++) // check by root n method { if (number % i == 0) { prime = 0; break; } } if (prime == 0) { printf("The number %d is not a prime number\n", number); } else { printf("The number %d is a prime number\n", number); } return 0; }
Output
Enter the number 13 The number 13 is a prime number