How to see led and resistor's current on serial monitor

Hi, i want to learn "i m using 3 red led and 3 diffrent ohm resistor by the way how can i see on serial monitor in arduino". i don't want to use any another thing. can you help me?

how can i see on serial monitor in arduino

You use the Serial.print() method of the Serial libiary class to print numbers, strings and variables. These appear on the serial monitor, which appears when you click the magnifying glass of top right of the program window.

i m using 3 red led and 3 diffrent ohm resistor

What exactly do you want to "see" about this setup?