What’s the logic

Question

What is the output of this code?
var arr = [2, 3, 5, 8];
var str='ll.
arr.forEach(x=>{
str+=x % 3;
}):
console.log (str);

Output: 2022

What’s the logic behind it?

I’m doing
2%3
3%3
5%3
8%3

Answer 1

G'day again. Have you learned the difference between division and modulo?

Division gives you the quotent ignoring any remainder , eg 7/3=2 ignores the 1 remainder.

Modulo gives the remainder ignoring the quotient, eg 7%3=1 remainder, ignores the 2 lots of 3.

Your code seems to give you remainder of 2%3 is 2, 3%3 is 0, 5%3 is 2, 8%3 is 2.

It concatenates (appends,adds,sticks on the end) each result digit to your string, which is like adding t + t + n + t gives ttnt.