Program to compute factorial of a number using recursion.

Code/C/FactorialRecursion.c

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+//Program to compute factorial of a number using recursion.
+# include<stdio.h>
+
+int fact(int);
+
+int main()
+{
+    int num, result;
+    printf("Enter a positive integer : \n");
+    scanf("%d", &num);
+
+    if(num < 0)
+    {
+        printf("Invalid positive integer. Please try again with positive integer.");
+        return 0;
+    }
+
+    result = fact(num);
+    printf("The factorial of %d is %d.", num, result);
+    return 0;
+}
+
+int fact(int n)
+{
+    if(n==0)
+        return 1;
+
+    if(n==1)
+        return(n);
+    else
+        return(n*fact(n-1));
+}