JSFiddle - React, Tailwind, and code Playground
JavaScript
const arr = ["123", "test", "45", "newTest"];
const arr2 = [`${arr[0]}${arr[1]}`];
console.log('arr2: ', arr2);
const test = "CS111"
console.log("test: ", test.toLowerCase())
const isNumber = 2000 < 2000
console.log('isNumber: ', isNumber);