How to use millis() or micro() function in Arduino Due

Hardware Arduino Due
1

I want to measure the execution time of my code using micros() function. I have previously used it in Arduino 2560. But when I am using it in Due, it is showing error. I assigned the time variable as -
Unsigned long time

and it is showing as
'long unsigned int time' redeclared as different kind of symbol

Please help me out.

2

If saving to a variable, you should do like this:

long actualTime = micros(); // Or, millis();