Given the following code snippet how long is the interval be

Given the following code snippet, how long is the interval between the LED flashing on and off? Answer with a number. Assume units = ms. Var b = require(\'bonescript\'); var led = \"P8_13\"; var state = 0; b.pinMode (led, \'out\'); toggleLED = function() {state = state ? 0: 1; b.digitalWrite (led, state);}; timer = setInterval (toggleLED, 100); stopTimer = function() {clearInterval (timer);}; setTimeout (stopTimer, 30000);

Solution

function returns 1 to variable toggleLED because state = state is flase so it returns 1 and timer set in the interval 1-100 milliseconds

Therefore between ON and OFF 100 milliseconds will be taken.