javascript-basic-challenges/javascript-basic-challenges.html at master · Isbj0rn/javascript-basic-challenges

64 lines (47 loc) · 1015 Bytes

<!DOCTYPE html>
<html>
<head>
	<script>
	function problem1(){
		var sum = 0;
		for (i = 2; i < 1000; ++i) {
			if((i % 3 ===0) || (i % 5 === 0)) {
				sum += i;
			}
	}
	alert("The sum of multiples of 3 and 5 below 1000 is " + sum + ".");
}

	function problem2(){
		var firsnum = 1;
		var secnum = 2;
		var sum = firsnum + secnum;
		var totalSum=0;

		while(sum < 4000000) {
			if(sum % 2 === 0){
				totalSum += sum;
			}
			firsnum = secnum;
			secnum = sum;
			sum = firsnum + secnum;

		}
		alert("The sum of the total even numbers in the Fibonacci sequence is " + totalSum + ".");
		}

	function problem3() {
		var x = 600851475143;
		var b = x;
		var i = 2;

		while (i < b) {
			while (b % i === 0) {
		(function(z) {
			b = z;
		})
				(b/i)
				}
				i++

			}
			alert("The largest prime factor of 600851475143 is equal to " + b + ".")
		}
	









</script>

<button onclick="problem1()">Problem 1</button>
<button onclick="problem2()">Problem 2</button>
<button onclick="problem3()">Problem 3</button>

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