diff --git a/RountreeLabs/Lab01/isPrime.c b/RountreeLabs/Lab01/isPrime.c
new file mode 100644
index 0000000..5fc47e0
--- /dev/null
+++ b/RountreeLabs/Lab01/isPrime.c
@@ -0,0 +1,21 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int is_prime(int n){
+	int i;
+	for(i=2;i<n;i++){
+		if(n%i == 0){
+			return 0;
+		}	
+	}
+	return 1;
+}
+int main(void){
+	int n = 2;
+	for (n = 2; n < 100; n++){
+		if(is_prime(n)){
+			printf("%d\n", n);
+		}
+	}
+	return EXIT_SUCCESS;
+}