JavaScript Functions

alert()

shows an alert box

alert(“Hello!)

prompt()

asks for user input

let name = prompt(“Enter name”)

console.log()

prints to console duh

typeof

checks variable type

typeof 42 // “number”

parseInt()

converts string → int

parseInt(“42”) // 42

parseFloat()

converts string → float

parseFloat(“3.13”) // 3.13

Number()

converts to number

Number(“5”) // 5

String()

converts to string

String(5) // "5"

.length

returns length

“hi”.length // 2