JSFiddle - React, Tailwind, and code Playground

by luka kupunia

JavaScript

var arr = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26];
var result = [];
function get(){
	for(var i = 0; i < arr.length; i++) {
    	if(arr[i] % 3 === 0){
          	result.push(arr[i - 1])
        }
    }
    console.log(result)
}
get(arr)