js convert variable value to string
let num1 = 10
let num2 = 4
let sum = num1 + num2
console.log(sum)
//normal result = 14
//use the String() method to convert the numbers into strings
let num1 = String(10)
let num2 = String(4)
let sum = num1 + num2
console.log(sum)
//new result = "104"