Merge pull request seeditsolution#255 from Ankit-07-17/patch-1

Factorial_of_a_number
Rishav-00 · Oct 2, 2020 · 4ae8c0f · 4ae8c0f
2 parents 012a9e4 + 619414d
commit 4ae8c0f
Showing 1 changed file with 19 additions and 0 deletions.
diff --git a/Factorial_of_a_number b/Factorial_of_a_number
@@ -0,0 +1,19 @@
+#include <stdio.h>
+int main() {
+    int n, i;
+    unsigned long long fact = 1;
+    printf("Enter an integer: ");
+    scanf("%d", &n);
+
+    // shows error if the user enters a negative integer
+    if (n < 0)
+        printf("Error! Factorial of a negative number doesn't exist.");
+    else {
+        for (i = 1; i <= n; ++i) {
+            fact *= i;
+        }
+        printf("Factorial of %d = %llu", n, fact);
+    }
+
+    return 0;
+}