let challenge = "30 Days Of JavaScript"
console.log(challenge)
console.log(challenge.length)
console.log(challenge.toUpperCase())
console.log(challenge.toLowerCase())
console.log(challenge.substring(3))
console.log(challenge.substring(0,3))
console.log(challenge.includes("Script"))
console.log(challenge.split())
console.log(challenge.split(" "))
console.log(challenge.replace("JavaScript", "Python"))
console.log(challenge.charAt(15))
console.log(challenge.charCodeAt(11))
console.log(challenge.indexOf("a"))
console.log(challenge.lastIndexOf("a"))
console.log(challenge.startsWith("3"))
console.log(challenge.endsWith("t"))
console.log(challenge.match(/a/gi))
console.log(challenge.repeat(2))
console.log("30 Days of ".concat("JavaScript"))


let companies = "Facebook, Google, Microsoft, Apple, IBM, Oracle, Amazon"
console.log(companies.split(" ,"))
console.log(companies.split(", "))

let sentence = "You cannot end a sentence with because because because is a conjunction"
console.log(sentence.indexOf("because"))
console.log(sentence.lastIndexOf("because"))
console.log(sentence.search("because"))

console.log(" 30 Days Of JavaScript ".trim())