diff --git a/lab2_3.c b/lab2_3.c
new file mode 100644
index 0000000..8a020a1
--- /dev/null
+++ b/lab2_3.c
@@ -0,0 +1,27 @@
+int is_prime(int n) {
+    if (n < 2) return 0;
+    for (int i = 2; i * i <= n; i++) {
+        if (n % i == 0) return 0;
+    }
+    return 1;
+}
+
+int main() {
+    int n;
+    printf("Enter n: ");
+    scanf("%d", &n);
+
+    if (n < 2) {
+        printf("Error: n must be >= 2\n");
+    } else {
+        printf("Prime numbers up to %d:\n", n);
+        for (int i = 2; i <= n; i++) {
+            if (is_prime(i)) {
+                printf("%d ", i);
+            }
+        }
+        printf("\n");
+    }
+
+    return 0;
+}