unsigned long t_start=0;
unsigned long t_stop=0;
unsigned long num=0;
unsigned long factorial(int n);
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
}
void loop() {
// put your main code here, to run repeatedly:
t_start=micros();
num=factorial(10);
t_stop=micros();
Serial.print(num);
Serial.print(", time: ");
Serial.print(t_stop-t_start);
Serial.println("us");
delay(5000);
}
unsigned long factorial(int n)
{
if (n==0)
{
return 1;
}
else
{
unsigned long fact=1;
for (int i=1; i<n; i++)
{
fact=fact*i;
}
return fact;
}
}