Current is in Amps. Voltage is in Volts. Resistance is in Ohms. Current is in Amps. Voltage is in Volts.
Power is in Watts.
Current is in Amps. Voltage is in Volts. VSupply is the supply voltage in volts. VLED is the LEDs operating voltage in volts. LEDCurrent is the current required by the LED in Amps.