Create Factorial.c

C Program to find the factorial of a number

Author: QuentinManemla

Factorial.c

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+include <stdio.h>
+int main()
+{
+    int n, i;
+    unsigned long long factorial = 1;
+
+    printf("Enter a number: ");
+    scanf("%d",&n);
+
+    // SHow error if number is less than 100
+    if (n < 0)
+        printf("Error! Factorial of a negative number doesn't exist.");
+
+    else
+    {
+        for(i=1; i<=n; ++i)
+        {
+            factorial *= i;              // factorial = factorial*i;
+        }
+        printf("Factorial of %d = %llu", n, factorial);
+    }
+
+    return 0;
+}