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Section-F: Subject Related Questions (Qs. 10-24)
Write a program in any language to find the prime numbers between 1.. n, where n is taken as user input.
Sample input:
Enter value of n: 20
Sample Output:
Prime Numbers: 2, 3, 5, 7, 11, 13, 17, 19,
#include
#include
// Function to check if a number is prime
bool is_prime(int num) {
if (num <= 1) {
return false;
}
for (int i = 2; i * i <= num; i++) {
if (num % i == 0) {
return false;
}
}
return true;
}
int main() {
int n;
// Take user input
printf("Enter value of n: ");
scanf("%d", &n);
printf("Prime Numbers: ");
// Find and print prime numbers
for (int i = 2; i <= n; i++) {
if (is_prime(i)) {
printf("%d, ", i);
}
}
printf("\b\b \n"); // To remove the last comma and space
return 0;
}
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