diff --git a/primenumber1 b/primenumber1
new file mode 100644
index 00000000..b9e5215e
--- /dev/null
+++ b/primenumber1
@@ -0,0 +1,7 @@
+#include <stdio.h> int main() 
+{ int n, i, flag = 0; printf("Enter a positive integer: "); 
+scanf("%d", &n); for (i = 2; i <= n / 2; ++i) {
+ // condition for non-prime if (n % i == 0) { flag = 1; break; } } 
+if (n == 1) { printf("1 is neither prime nor composite."); } 
+else { if (flag == 0) printf("%d is a prime number.", n);
+ else printf("%d is not a prime number.", n); } return 0; }