JSFiddle - React, Tailwind, and code Playground

by hescano

JavaScript

function buildTriangle(n) {
	var count = 1;
  var total = 0;
  var arr = [];
  for (var i = 0; i < n; i++) {
  	for (var j = 0; j < count; j++) {
    	arr.push(i);
      count++;
    }
  }
  
  return arr;
}

console.log(buildTriangle(3))