https://repl.it/CTRj/46 created by sethopia

Round Town (1.2).js

/*
	ROUND TOWN
	
	We will look at 3 Math functions in some depth: 
		Math.floor(x) 
		Math.ceil(x) 
		Math.round(x) 
		
		 Math.floor() returns the largest integer less than or equal to a given number.
		 	ex) 
		 		Math.floor(13.45) ==> 13
	
		Math.ceil() returns the largest integer greater than or equal to a given number.
			ex) 
		 		Math.ceil(13.45) ==> 14
		 		
		Math.round() rounds to the nearest integer
			ex) 
		 		Math.round(13.45) ==> 13
		 		Math.round(-214.55) ==> -215
	
	
	Create a function sumMultiplyAndRound that takes 3 numbers. The function should sum the first two numbers passed in, round them down to the nearest integer. The rounded sum should then be multiplied by the third argument, rounded up and returned.
	
	ex)
		sumMultiplyAndRound(2, 3.5, 6.2) ==> 31
*/

function sumMultiplyAndRound(n1,n2,n3) {
	return Math.ceil((n3*(Math.floor(n1+n2))));
}

console.log(sumMultiplyAndRound(2, 3.5, 6.2));

Round Town (1.2)_console_dump.txt

Native Browser JavaScript
>>> 31