Answers for "what does the for in loop do in js"

for in js

var colors=["red","blue","green"];
for(let col of colors){
  console.log(col);
}
// red
// blue
// green

for in loop javascript

var subjects = {
	'math': 85,
	'physics': 75,
}

for (var i in subjects) {
	console.log(i + ' : ' + subjects[i]);
}

// math : 85
// physics : 75