diff --git a/maths/factorial.c b/maths/factorial.c
new file mode 100644
index 0000000000..b7e8014abb
--- /dev/null
+++ b/maths/factorial.c
@@ -0,0 +1,23 @@
+–
+#include <stdio.h>
+
+int main(void) {
+    long long n;
+    printf("Enter a non-negative integer: ");
+    if (scanf("%lld", &n) != 1) {
+        printf("Invalid input\n");
+        return 1;
+    }
+    if (n < 0) {
+        printf("Factorial is not defined for negative numbers.\n");
+        return 1;
+    }
+
+    long long result = 1;
+    for (long long i = 2; i <= n; ++i) {
+        result *= i;
+    }
+
+    printf("%lld! = %lld\n", n, result);
+    return 0;
+}