R = 100; // resistance in ohms I = 0.3; // current in amps P = I^2 * R; // power //power specification of the resistors available in the stock Pa = 5; Pb = 7.5; Pc = 10; if Pa > P then disp("we should select resistor a") end if Pb > P then disp("we should select resistor b") end if Pc > P then disp("we should select resistor c") end